15120101220 has 96 divisors (see below), whose sum is σ = 48753847296. Its totient is φ = 3429628800.

The previous prime is 15120101209. The next prime is 15120101221. The reversal of 15120101220 is 2210102151.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 15120101220.

It is not an unprimeable number, because it can be changed into a prime (15120101221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82386 + ... + 192425.

It is an arithmetic number, because the mean of its divisors is an integer number (507852576).

Almost surely, 2^15120101220 is an apocalyptic number.

15120101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15120101220 is an abundant number, since it is smaller than the sum of its proper divisors (33633746076).

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

15120101220 is a wasteful number, since it uses less digits than its factorization.

15120101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274961 (or 274959 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 15120101220 its reverse (2210102151), we get a palindrome (17330203371).

The spelling of 15120101220 in words is "fifteen billion, one hundred twenty million, one hundred one thousand, two hundred twenty".