10121025021 has 16 divisors (see below), whose sum is σ = 14294232000. Its totient is φ = 6347902208.

The previous prime is 10121025017. The next prime is 10121025053. The reversal of 10121025021 is 12052012101.

It is a cyclic number.

It is not a de Polignac number, because 10121025021 - 2² = 10121025017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121025011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93055 + ... + 170003.

It is an arithmetic number, because the mean of its divisors is an integer number (893389500).

Almost surely, 2^10121025021 is an apocalyptic number.

It is an amenable number.

10121025021 is a deficient number, since it is larger than the sum of its proper divisors (4173206979).

10121025021 is a wasteful number, since it uses less digits than its factorization.

10121025021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79548.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 10121025021 its reverse (12052012101), we get a palindrome (22173037122).

The spelling of 10121025021 in words is "ten billion, one hundred twenty-one million, twenty-five thousand, twenty-one".