21210110202012 has 48 divisors (see below), whose sum is σ = 50917160612640. Its totient is φ = 6866865027072.

The previous prime is 21210110201999. The next prime is 21210110202041. The reversal of 21210110202012 is 21020201101212.

It is a junction number, because it is equal to n+sod(n) for n = 21210110201982 and 21210110202000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41724973 + ... + 42230244.

It is an arithmetic number, because the mean of its divisors is an integer number (1060774179430).

Almost surely, 2^{21210110202012} is an apocalyptic number.

It is an amenable number.

21210110202012 is an abundant number, since it is smaller than the sum of its proper divisors (29707050410628).

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

21210110202012 is a wasteful number, since it uses less digits than its factorization.

21210110202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83955830 (or 83955828 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21210110202012 its reverse (21020201101212), we get a palindrome (42230311303224).

The spelling of 21210110202012 in words is "twenty-one trillion, two hundred ten billion, one hundred ten million, two hundred two thousand, twelve".