221021211012222 has 16 divisors (see below), whose sum is σ = 442048703754240. Its totient is φ = 73672690049112.

The previous prime is 221021211012191. The next prime is 221021211012247. The reversal of 221021211012222 is 222210112120122.

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, 261281278 + ... + 262125825.

It is an arithmetic number, because the mean of its divisors is an integer number (27628043984640).

Almost surely, 2^{221021211012222} is an apocalyptic number.

221021211012222 is an abundant number, since it is smaller than the sum of its proper divisors (221027492742018).

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

221021211012222 is a wasteful number, since it uses less digits than its factorization.

221021211012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523477487.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221021211012222 its reverse (222210112120122), we get a palindrome (443231323132344).

The spelling of 221021211012222 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred eleven million, twelve thousand, two hundred twenty-two".