202120120121001 has 48 divisors (see below), whose sum is σ = 281286359895744. Its totient is φ = 129081834960000.

The previous prime is 202120120120991. The next prime is 202120120121009. The reversal of 202120120121001 is 100121021021202.

It is not a de Polignac number, because 202120120121001 - 2²² = 202120115926697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202120120121009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 401081971 + ... + 401585591.

It is an arithmetic number, because the mean of its divisors is an integer number (5860132497828).

Almost surely, 2^{202120120121001} is an apocalyptic number.

It is an amenable number.

202120120121001 is a deficient number, since it is larger than the sum of its proper divisors (79166239774743).

202120120121001 is a wasteful number, since it uses less digits than its factorization.

202120120121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505094 (or 505063 counting only the distinct ones).

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

Adding to 202120120121001 its reverse (100121021021202), we get a palindrome (302241141142203).

The spelling of 202120120121001 in words is "two hundred two trillion, one hundred twenty billion, one hundred twenty million, one hundred twenty-one thousand, one".