21012000030231 has 64 divisors (see below), whose sum is σ = 32295291764736. Its totient is φ = 11903327136000.

The previous prime is 21012000030221. The next prime is 21012000030251. The reversal of 21012000030231 is 13203000021012.

It is not a de Polignac number, because 21012000030231 - 2⁶ = 21012000030167 is a prime.

It is a super-2 number, since 2×21012000030231² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21012000030231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012000030221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4193172516 + ... + 4193177526.

It is an arithmetic number, because the mean of its divisors is an integer number (504613933824).

Almost surely, 2^{21012000030231} is an apocalyptic number.

21012000030231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21012000030231 is a deficient number, since it is larger than the sum of its proper divisors (11283291734505).

21012000030231 is a wasteful number, since it uses less digits than its factorization.

21012000030231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7572.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21012000030231 its reverse (13203000021012), we get a palindrome (34215000051243).

The spelling of 21012000030231 in words is "twenty-one trillion, twelve billion, thirty thousand, two hundred thirty-one".