100012111021021 has 4 divisors (see below), whose sum is σ = 100012499715772. Its totient is φ = 100011722326272.

The previous prime is 100012111021013. The next prime is 100012111021169. The reversal of 100012111021021 is 120120111210001.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8699963184900 + 91312147836121 = 2949570^2 + 9555739^2 .

It is a cyclic number.

It is not a de Polignac number, because 100012111021021 - 2³ = 100012111021013 is a prime.

It is a super-2 number, since 2×100012111021021² (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 = 100012111020992 and 100012111021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100012111021421) 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, 193961166 + ... + 194476111.

It is an arithmetic number, because the mean of its divisors is an integer number (25003124928943).

Almost surely, 2^{100012111021021} is an apocalyptic number.

It is an amenable number.

100012111021021 is a deficient number, since it is larger than the sum of its proper divisors (388694751).

100012111021021 is an equidigital number, since it uses as much as digits as its factorization.

100012111021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388694750.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 100012111021021 its reverse (120120111210001), we get a palindrome (220132222231022).

The spelling of 100012111021021 in words is "one hundred trillion, twelve billion, one hundred eleven million, twenty-one thousand, twenty-one".