100212202220021 has 4 divisors (see below), whose sum is σ = 100534427950944. Its totient is φ = 99889976489100.

The previous prime is 100212202219967. The next prime is 100212202220023. The reversal of 100212202220021 is 120022202212001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100212202220021 - 2³⁸ = 99937324313077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212202220023) 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, 161112864995 + ... + 161112865616.

It is an arithmetic number, because the mean of its divisors is an integer number (25133606987736).

Almost surely, 2^{100212202220021} is an apocalyptic number.

It is an amenable number.

100212202220021 is a deficient number, since it is larger than the sum of its proper divisors (322225730923).

100212202220021 is an equidigital number, since it uses as much as digits as its factorization.

100212202220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322225730922.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 100212202220021 its reverse (120022202212001), we get a palindrome (220234404432022).

The spelling of 100212202220021 in words is "one hundred trillion, two hundred twelve billion, two hundred two million, two hundred twenty thousand, twenty-one".