21010100110212 has 12 divisors (see below), whose sum is σ = 49023566923856. Its totient is φ = 7003366703400.

The previous prime is 21010100110211. The next prime is 21010100110249. The reversal of 21010100110212 is 21201100101012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21010100110212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 1750841675851 = 21010100110212 / (2 + 1 + 0 + 1 + 0 + 1 + 0 + 0 + 1 + 1 + 0 + 2 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (21010100110211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875420837914 + ... + 875420837937.

Almost surely, 2^{21010100110212} is an apocalyptic number.

It is an amenable number.

21010100110212 is an abundant number, since it is smaller than the sum of its proper divisors (28013466813644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21010100110212 is a wasteful number, since it uses less digits than its factorization.

21010100110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750841675858 (or 1750841675856 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21010100110212 its reverse (21201100101012), we get a palindrome (42211200211224).

The spelling of 21010100110212 in words is "twenty-one trillion, ten billion, one hundred million, one hundred ten thousand, two hundred twelve".