202101122101021 has 16 divisors (see below), whose sum is σ = 239784312716928. Its totient is φ = 167916185352000.

The previous prime is 202101122101001. The next prime is 202101122101031. The reversal of 202101122101021 is 120101221101202.

It is a cyclic number.

It is not a de Polignac number, because 202101122101021 - 2¹⁷ = 202101121969949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202101122100986 and 202101122101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101122101001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6996493281 + ... + 6996522166.

It is an arithmetic number, because the mean of its divisors is an integer number (14986519544808).

Almost surely, 2^{202101122101021} is an apocalyptic number.

It is an amenable number.

202101122101021 is a deficient number, since it is larger than the sum of its proper divisors (37683190615907).

202101122101021 is a wasteful number, since it uses less digits than its factorization.

202101122101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13993015572.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 202101122101021 its reverse (120101221101202), we get a palindrome (322202343202223).

The spelling of 202101122101021 in words is "two hundred two trillion, one hundred one billion, one hundred twenty-two million, one hundred one thousand, twenty-one".