21010112111210 has 128 divisors (see below), whose sum is σ = 40885679729664. Its totient is φ = 7753382461440.

The previous prime is 21010112111207. The next prime is 21010112111213. The reversal of 21010112111210 is 1211121101012.

It is an interprime number because it is at equal distance from previous prime (21010112111207) and next prime (21010112111213).

It is a super-2 number, since 2×21010112111210² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21010112111213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 884512694 + ... + 884536446.

It is an arithmetic number, because the mean of its divisors is an integer number (319419372888).

Almost surely, 2^{21010112111210} is an apocalyptic number.

21010112111210 is a deficient number, since it is larger than the sum of its proper divisors (19875567618454).

21010112111210 is a wasteful number, since it uses less digits than its factorization.

21010112111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24888.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21010112111210 its reverse (1211121101012), we get a palindrome (22221233212222).

The spelling of 21010112111210 in words is "twenty-one trillion, ten billion, one hundred twelve million, one hundred eleven thousand, two hundred ten".