220121122211112 has 128 divisors (see below), whose sum is σ = 591108555916800. Its totient is φ = 68061042536448.

The previous prime is 220121122211041. The next prime is 220121122211171. The reversal of 220121122211112 is 211112221121022.

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, 11822818 + ... + 24083630.

It is an arithmetic number, because the mean of its divisors is an integer number (4618035593100).

Almost surely, 2^{220121122211112} 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 220121122211112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295554277958400).

220121122211112 is an abundant number, since it is smaller than the sum of its proper divisors (370987433705688).

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

220121122211112 is a wasteful number, since it uses less digits than its factorization.

220121122211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12261475 (or 12261471 counting only the distinct ones).

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

Adding to 220121122211112 its reverse (211112221121022), we get a palindrome (431233343332134).

The spelling of 220121122211112 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, one hundred twelve".