21211210202222 has 32 divisors (see below), whose sum is σ = 32327066822400. Its totient is φ = 10436770706688.

The previous prime is 21211210202201. The next prime is 21211210202261. The reversal of 21211210202222 is 22220201211212.

It is a junction number, because it is equal to n+sod(n) for n = 21211210202194 and 21211210202203.

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, 709888679 + ... + 709918557.

It is an arithmetic number, because the mean of its divisors is an integer number (1010220838200).

Almost surely, 2^{21211210202222} is an apocalyptic number.

21211210202222 is a deficient number, since it is larger than the sum of its proper divisors (11115856620178).

21211210202222 is a wasteful number, since it uses less digits than its factorization.

21211210202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50600.

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

Adding to 21211210202222 its reverse (22220201211212), we get a palindrome (43431411413434).

The spelling of 21211210202222 in words is "twenty-one trillion, two hundred eleven billion, two hundred ten million, two hundred two thousand, two hundred twenty-two".