202101122021121 has 16 divisors (see below), whose sum is σ = 299410477192320. Its totient is φ = 134733447958320.

The previous prime is 202101122021027. The next prime is 202101122021131. The reversal of 202101122021121 is 121120221101202.

202101122021121 is a `hidden beast` number, since 2 + 0 + 210 + 1 + 1 + 220 + 211 + 21 = 666.

It is not a de Polignac number, because 202101122021121 - 2¹³ = 202101122012929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202101122021094 and 202101122021103.

It is not an unprimeable number, because it can be changed into a prime (202101122021131) 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, 11708565 + ... + 23265698.

It is an arithmetic number, because the mean of its divisors is an integer number (18713154824520).

Almost surely, 2^{202101122021121} is an apocalyptic number.

It is an amenable number.

202101122021121 is a deficient number, since it is larger than the sum of its proper divisors (97309355171199).

202101122021121 is a wasteful number, since it uses less digits than its factorization.

202101122021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35188293 (or 35188287 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 202101122021121 its reverse (121120221101202), we get a palindrome (323221343122323).

The spelling of 202101122021121 in words is "two hundred two trillion, one hundred one billion, one hundred twenty-two million, twenty-one thousand, one hundred twenty-one".