21010012022012 has 48 divisors (see below), whose sum is σ = 40262770084992. Its totient is φ = 9534694438080.

The previous prime is 21010012022011. The next prime is 21010012022033. The reversal of 21010012022012 is 21022021001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010012022011) 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, 10624718 + ... + 12446069.

It is an arithmetic number, because the mean of its divisors is an integer number (838807710104).

Almost surely, 2^{21010012022012} is an apocalyptic number.

It is an amenable number.

21010012022012 is a deficient number, since it is larger than the sum of its proper divisors (19252758062980).

21010012022012 is a wasteful number, since it uses less digits than its factorization.

21010012022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23071098 (or 23071096 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21010012022012 its reverse (21022021001012), we get a palindrome (42032033023024).

The spelling of 21010012022012 in words is "twenty-one trillion, ten billion, twelve million, twenty-two thousand, twelve".