21221211202022 has 32 divisors (see below), whose sum is σ = 37328948949600. Its totient is φ = 8958947735808.

The previous prime is 21221211202013. The next prime is 21221211202063. The reversal of 21221211202022 is 22020211212212.

It is a junction number, because it is equal to n+sod(n) for n = 21221211201985 and 21221211202003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 740639423 + ... + 740668074.

It is an arithmetic number, because the mean of its divisors is an integer number (1166529654675).

Almost surely, 2^{21221211202022} is an apocalyptic number.

21221211202022 is a deficient number, since it is larger than the sum of its proper divisors (16107737747578).

21221211202022 is a wasteful number, since it uses less digits than its factorization.

21221211202022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481307560.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21221211202022 its reverse (22020211212212), we get a palindrome (43241422414234).

The spelling of 21221211202022 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, two hundred two thousand, twenty-two".