222220121221112 has 128 divisors (see below), whose sum is σ = 521784332668800. Its totient is φ = 86510740635648.

The previous prime is 222220121221097. The next prime is 222220121221171. The reversal of 222220121221112 is 211122121022222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70035458 + ... + 73139630.

It is an arithmetic number, because the mean of its divisors is an integer number (4076440098975).

Almost surely, 2^{222220121221112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222220121221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260892166334400).

222220121221112 is an abundant number, since it is smaller than the sum of its proper divisors (299564211447688).

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

222220121221112 is a wasteful number, since it uses less digits than its factorization.

222220121221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106825 (or 3106821 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222220121221112 its reverse (211122121022222), we get a palindrome (433342242243334).

The spelling of 222220121221112 in words is "two hundred twenty-two trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".