221221221111022 has 16 divisors (see below), whose sum is σ = 381050907177600. Its totient is φ = 95262726794040.

The previous prime is 221221221110999. The next prime is 221221221111101. The reversal of 221221221111022 is 220111122122122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 221221221110984 and 221221221111002.

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, 264618685122 + ... + 264618685957.

It is an arithmetic number, because the mean of its divisors is an integer number (23815681698600).

Almost surely, 2^{221221221111022} is an apocalyptic number.

221221221111022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221221221111022 is a deficient number, since it is larger than the sum of its proper divisors (159829686066578).

221221221111022 is a wasteful number, since it uses less digits than its factorization.

221221221111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529237371111.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 221221221111022 its reverse (220111122122122), we get a palindrome (441332343233144).

The spelling of 221221221111022 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, twenty-two".