21000012031310 has 32 divisors (see below), whose sum is σ = 40809231231552. Its totient is φ = 7734514291200.

The previous prime is 21000012031267. The next prime is 21000012031319. The reversal of 21000012031310 is 1313021000012.

It is a super-2 number, since 2×21000012031310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000012031319) 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, 201367514 + ... + 201471773.

It is an arithmetic number, because the mean of its divisors is an integer number (1275288475986).

Almost surely, 2^{21000012031310} is an apocalyptic number.

21000012031310 is a deficient number, since it is larger than the sum of its proper divisors (19809219200242).

21000012031310 is a wasteful number, since it uses less digits than its factorization.

21000012031310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402839708.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21000012031310 its reverse (1313021000012), we get a palindrome (22313033031322).

The spelling of 21000012031310 in words is "twenty-one trillion, twelve million, thirty-one thousand, three hundred ten".