220121530 has 16 divisors (see below), whose sum is σ = 398100384. Its totient is φ = 87630480.

The previous prime is 220121519. The next prime is 220121549. The reversal of 220121530 is 35121022.

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, 50052 + ... + 54271.

It is an arithmetic number, because the mean of its divisors is an integer number (24881274).

Almost surely, 2^220121530 is an apocalyptic number.

220121530 is a deficient number, since it is larger than the sum of its proper divisors (177978854).

220121530 is a wasteful number, since it uses less digits than its factorization.

220121530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104541.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 220121530 is about 14836.4931840378. The cubic root of 220121530 is about 603.7922128552.

Adding to 220121530 its reverse (35121022), we get a palindrome (255242552).

The spelling of 220121530 in words is "two hundred twenty million, one hundred twenty-one thousand, five hundred thirty".