100202020121021 has 16 divisors (see below), whose sum is σ = 123334559405568. Its totient is φ = 79274935958400.

The previous prime is 100202020120987. The next prime is 100202020121039. The reversal of 100202020121021 is 120121020202001.

It is not a de Polignac number, because 100202020121021 - 2²⁶ = 100201953012157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100202020120987 and 100202020121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100202020124021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38906960 + ... + 41402361.

It is an arithmetic number, because the mean of its divisors is an integer number (7708409962848).

Almost surely, 2^{100202020121021} is an apocalyptic number.

It is an amenable number.

100202020121021 is a deficient number, since it is larger than the sum of its proper divisors (23132539284547).

100202020121021 is a wasteful number, since it uses less digits than its factorization.

100202020121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80323052.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 100202020121021 its reverse (120121020202001), we get a palindrome (220323040323022).

The spelling of 100202020121021 in words is "one hundred trillion, two hundred two billion, twenty million, one hundred twenty-one thousand, twenty-one".