202101020021121 has 32 divisors (see below), whose sum is σ = 294174302997120. Its totient is φ = 122665046644224.

The previous prime is 202101020021099. The next prime is 202101020021249. The reversal of 202101020021121 is 121120020101202.

It is not a de Polignac number, because 202101020021121 - 2³¹ = 202098872537473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202101020021121.

It is not an unprimeable number, because it can be changed into a prime (202101020021321) 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, 400203835 + ... + 400708511.

It is an arithmetic number, because the mean of its divisors is an integer number (9192946968660).

Almost surely, 2^{202101020021121} is an apocalyptic number.

It is an amenable number.

202101020021121 is a deficient number, since it is larger than the sum of its proper divisors (92073282975999).

202101020021121 is a wasteful number, since it uses less digits than its factorization.

202101020021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645425.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 202101020021121 its reverse (121120020101202), we get a palindrome (323221040122323).

The spelling of 202101020021121 in words is "two hundred two trillion, one hundred one billion, twenty million, twenty-one thousand, one hundred twenty-one".