202111020002121 has 16 divisors (see below), whose sum is σ = 275442913843200. Its totient is φ = 131791783048848.

The previous prime is 202111020002107. The next prime is 202111020002137. The reversal of 202111020002121 is 121200020111202.

It is not a de Polignac number, because 202111020002121 - 2⁹ = 202111020001609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202111020002121.

It is not an unprimeable number, because it can be changed into a prime (202111020002321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3984970501 + ... + 3985021218.

It is an arithmetic number, because the mean of its divisors is an integer number (17215182115200).

Almost surely, 2^{202111020002121} is an apocalyptic number.

It is an amenable number.

202111020002121 is a deficient number, since it is larger than the sum of its proper divisors (73331893841079).

202111020002121 is a wasteful number, since it uses less digits than its factorization.

202111020002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7969991908.

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

Adding to 202111020002121 its reverse (121200020111202), we get a palindrome (323311040113323).

The spelling of 202111020002121 in words is "two hundred two trillion, one hundred eleven billion, twenty million, two thousand, one hundred twenty-one".