21201102012212 has 24 divisors (see below), whose sum is σ = 37129788818304. Its totient is φ = 10592592623712.

The previous prime is 21201102012143. The next prime is 21201102012221. The reversal of 21201102012212 is 21221020110212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50746718 + ... + 51162794.

It is an arithmetic number, because the mean of its divisors is an integer number (1547074534096).

Almost surely, 2^{21201102012212} is an apocalyptic number.

It is an amenable number.

21201102012212 is a deficient number, since it is larger than the sum of its proper divisors (15928686806092).

21201102012212 is a wasteful number, since it uses less digits than its factorization.

21201102012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425615 (or 425613 counting only the distinct ones).

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

Adding to 21201102012212 its reverse (21221020110212), we get a palindrome (42422122122424).

The spelling of 21201102012212 in words is "twenty-one trillion, two hundred one billion, one hundred two million, twelve thousand, two hundred twelve".