21221211670922 has 16 divisors (see below), whose sum is σ = 31952706282432. Its totient is φ = 10570349183520.

The previous prime is 21221211670889. The next prime is 21221211670927. The reversal of 21221211670922 is 22907611212212.

It is a super-2 number, since 2×21221211670922² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21221211670927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8828963 + ... + 10972374.

It is an arithmetic number, because the mean of its divisors is an integer number (1997044142652).

Almost surely, 2^{21221211670922} is an apocalyptic number.

21221211670922 is a deficient number, since it is larger than the sum of its proper divisors (10731494611510).

21221211670922 is a wasteful number, since it uses less digits than its factorization.

21221211670922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19803373.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 21221211670922 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, six hundred seventy thousand, nine hundred twenty-two".