21011312012030 has 16 divisors (see below), whose sum is σ = 37820465285904. Its totient is φ = 8404501768320.

The previous prime is 21011312012027. The next prime is 21011312012039. The reversal of 21011312012030 is 3021021311012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011312012039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1230569 + ... + 6598251.

It is an arithmetic number, because the mean of its divisors is an integer number (2363779080369).

Almost surely, 2^{21011312012030} is an apocalyptic number.

21011312012030 is a deficient number, since it is larger than the sum of its proper divisors (16809153273874).

21011312012030 is a wasteful number, since it uses less digits than its factorization.

21011312012030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5759131.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21011312012030 its reverse (3021021311012), we get a palindrome (24032333323042).

The spelling of 21011312012030 in words is "twenty-one trillion, eleven billion, three hundred twelve million, twelve thousand, thirty".