10021131021 has 16 divisors (see below), whose sum is σ = 15046391808. Its totient is φ = 5877495600.

The previous prime is 10021131017. The next prime is 10021131067. The reversal of 10021131021 is 12013112001.

It is not a de Polignac number, because 10021131021 - 2² = 10021131017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021130988 and 10021131006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021131121) 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, 4896891 + ... + 4898936.

It is an arithmetic number, because the mean of its divisors is an integer number (940399488).

Almost surely, 2^10021131021 is an apocalyptic number.

10021131021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10021131021 is a deficient number, since it is larger than the sum of its proper divisors (5025260787).

10021131021 is a wasteful number, since it uses less digits than its factorization.

10021131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9795872.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 10021131021 its reverse (12013112001), we get a palindrome (22034243022).

The spelling of 10021131021 in words is "ten billion, twenty-one million, one hundred thirty-one thousand, twenty-one".