221121211211022 has 16 divisors (see below), whose sum is σ = 442242992090880. Its totient is φ = 73706975458872.

The previous prime is 221121211210951. The next prime is 221121211211059. The reversal of 221121211211022 is 220112112121122.

It is a self number, because there is not a number n which added to its sum of digits gives 221121211211022.

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, 18604822 + ... + 28078137.

It is an arithmetic number, because the mean of its divisors is an integer number (27640187005680).

Almost surely, 2^{221121211211022} is an apocalyptic number.

221121211211022 is an abundant number, since it is smaller than the sum of its proper divisors (221121780879858).

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

221121211211022 is a wasteful number, since it uses less digits than its factorization.

221121211211022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47472407.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221121211211022 its reverse (220112112121122), we get a palindrome (441233323332144).

The spelling of 221121211211022 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, twenty-two".