10021021125 has 16 divisors (see below), whose sum is σ = 16674979776. Its totient is φ = 5344544400.

The previous prime is 10021021123. The next prime is 10021021169. The reversal of 10021021125 is 52112012001.

It is not a de Polignac number, because 10021021125 - 2¹ = 10021021123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021021123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13360987 + ... + 13361736.

It is an arithmetic number, because the mean of its divisors is an integer number (1042186236).

Almost surely, 2^10021021125 is an apocalyptic number.

10021021125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10021021125 is a deficient number, since it is larger than the sum of its proper divisors (6653958651).

10021021125 is an equidigital number, since it uses as much as digits as its factorization.

10021021125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26722741 (or 26722731 counting only the distinct ones).

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

Adding to 10021021125 its reverse (52112012001), we get a palindrome (62133033126).

The spelling of 10021021125 in words is "ten billion, twenty-one million, twenty-one thousand, one hundred twenty-five".