21012010222012 has 12 divisors (see below), whose sum is σ = 36773791268760. Its totient is φ = 10505212716656.

The previous prime is 21012010222001. The next prime is 21012010222033. The reversal of 21012010222012 is 21022201021012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198038923 + ... + 198144994.

It is an arithmetic number, because the mean of its divisors is an integer number (3064482605730).

Almost surely, 2^{21012010222012} is an apocalyptic number.

It is an amenable number.

21012010222012 is a deficient number, since it is larger than the sum of its proper divisors (15761781046748).

21012010222012 is a wasteful number, since it uses less digits than its factorization.

21012010222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396197180 (or 396197178 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012010222012 its reverse (21022201021012), we get a palindrome (42034211243024).

The spelling of 21012010222012 in words is "twenty-one trillion, twelve billion, ten million, two hundred twenty-two thousand, twelve".