100202121021 has 32 divisors (see below), whose sum is σ = 148026486528. Its totient is φ = 60018416640.

The previous prime is 100202121013. The next prime is 100202121053. The reversal of 100202121021 is 120121202001.

It is not a de Polignac number, because 100202121021 - 2³ = 100202121013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100202120988 and 100202121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100202121121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400945 + ... + 600966.

It is an arithmetic number, because the mean of its divisors is an integer number (4625827704).

Almost surely, 2^100202121021 is an apocalyptic number.

It is an amenable number.

100202121021 is a deficient number, since it is larger than the sum of its proper divisors (47824365507).

100202121021 is a wasteful number, since it uses less digits than its factorization.

100202121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002021.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100202121021 its reverse (120121202001), we get a palindrome (220323323022).

The spelling of 100202121021 in words is "one hundred billion, two hundred two million, one hundred twenty-one thousand, twenty-one".