220121292 has 24 divisors (see below), whose sum is σ = 526144752. Its totient is φ = 71584000.

The previous prime is 220121273. The next prime is 220121303. The reversal of 220121292 is 292121022.

It is a happy number.

220121292 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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, 223209 + ... + 224192.

It is an arithmetic number, because the mean of its divisors is an integer number (21922698).

Almost surely, 2^220121292 is an apocalyptic number.

It is an amenable number.

220121292 is an abundant number, since it is smaller than the sum of its proper divisors (306023460).

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

220121292 is a wasteful number, since it uses less digits than its factorization.

220121292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447449 (or 447447 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 220121292 is about 14836.4851632723. The cubic root of 220121292 is about 603.7919952442.

The spelling of 220121292 in words is "two hundred twenty million, one hundred twenty-one thousand, two hundred ninety-two".