21022211210012 has 96 divisors (see below), whose sum is σ = 41986408665600. Its totient is φ = 9155973480192.

The previous prime is 21022211209999. The next prime is 21022211210059. The reversal of 21022211210012 is 21001211222012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10593638 + ... + 12420530.

It is an arithmetic number, because the mean of its divisors is an integer number (437358423600).

Almost surely, 2^{21022211210012} is an apocalyptic number.

It is an amenable number.

21022211210012 is a deficient number, since it is larger than the sum of its proper divisors (20964197455588).

21022211210012 is a wasteful number, since it uses less digits than its factorization.

21022211210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827195 (or 1827193 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21022211210012 its reverse (21001211222012), we get a palindrome (42023422432024).

The spelling of 21022211210012 in words is "twenty-one trillion, twenty-two billion, two hundred eleven million, two hundred ten thousand, twelve".