10202120121021 has 32 divisors (see below), whose sum is σ = 13758887804928. Its totient is φ = 6723549504000.

The previous prime is 10202120120999. The next prime is 10202120121041. The reversal of 10202120121021 is 12012102120201.

It is not a de Polignac number, because 10202120121021 - 2¹³ = 10202120112829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202120121041) 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, 1091948676 + ... + 1091958018.

It is an arithmetic number, because the mean of its divisors is an integer number (429965243904).

Almost surely, 2^{10202120121021} is an apocalyptic number.

It is an amenable number.

10202120121021 is a deficient number, since it is larger than the sum of its proper divisors (3556767683907).

10202120121021 is a wasteful number, since it uses less digits than its factorization.

10202120121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13361.

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

Adding to 10202120121021 its reverse (12012102120201), we get a palindrome (22214222241222).

The spelling of 10202120121021 in words is "ten trillion, two hundred two billion, one hundred twenty million, one hundred twenty-one thousand, twenty-one".