21022211220222 has 32 divisors (see below), whose sum is σ = 42115703913504. Its totient is φ = 6995526451200.

The previous prime is 21022211220217. The next prime is 21022211220239. The reversal of 21022211220222 is 22202211222012.

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, 28391022 + ... + 29122062.

It is an arithmetic number, because the mean of its divisors is an integer number (1316115747297).

Almost surely, 2^{21022211220222} is an apocalyptic number.

21022211220222 is an abundant number, since it is smaller than the sum of its proper divisors (21093492693282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022211220222 is a wasteful number, since it uses less digits than its factorization.

21022211220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739164.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21022211220222 its reverse (22202211222012), we get a palindrome (43224422442234).

The spelling of 21022211220222 in words is "twenty-one trillion, twenty-two billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-two".