10202121120021 has 64 divisors (see below), whose sum is σ = 15096855552000. Its totient is φ = 6103121437440.

The previous prime is 10202121119989. The next prime is 10202121120047. The reversal of 10202121120021 is 12002112120201.

10202121120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10202121120021 - 2⁵ = 10202121119989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202121120421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23660271 + ... + 24087603.

It is an arithmetic number, because the mean of its divisors is an integer number (235888368000).

Almost surely, 2^{10202121120021} is an apocalyptic number.

It is an amenable number.

10202121120021 is a deficient number, since it is larger than the sum of its proper divisors (4894734431979).

10202121120021 is a wasteful number, since it uses less digits than its factorization.

10202121120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427674.

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

Adding to 10202121120021 its reverse (12002112120201), we get a palindrome (22204233240222).

The spelling of 10202121120021 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty thousand, twenty-one".