100211231312021 has 4 divisors (see below), whose sum is σ = 100583763770700. Its totient is φ = 99838698853344.

The previous prime is 100211231311991. The next prime is 100211231312051. The reversal of 100211231312021 is 120213132112001.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (100211231311991) and next prime (100211231312051).

It can be written as a sum of positive squares in 2 ways, for example, as 29296390312996 + 70914840999025 = 5412614^2 + 8421095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100211231312021 is a prime.

It is a super-2 number, since 2×100211231312021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100211231311984 and 100211231312002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100211231312051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186266228936 + ... + 186266229473.

It is an arithmetic number, because the mean of its divisors is an integer number (25145940942675).

Almost surely, 2^{100211231312021} is an apocalyptic number.

It is an amenable number.

100211231312021 is a deficient number, since it is larger than the sum of its proper divisors (372532458679).

100211231312021 is an equidigital number, since it uses as much as digits as its factorization.

100211231312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372532458678.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 100211231312021 its reverse (120213132112001), we get a palindrome (220424363424022).

The spelling of 100211231312021 in words is "one hundred trillion, two hundred eleven billion, two hundred thirty-one million, three hundred twelve thousand, twenty-one".