15122922221 has 8 divisors (see below), whose sum is σ = 16589901600. Its totient is φ = 13671304240.

The previous prime is 15122922209. The next prime is 15122922229. The reversal of 15122922221 is 12222922151.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-15122922221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15122922229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3838286 + ... + 3842223.

It is an arithmetic number, because the mean of its divisors is an integer number (2073737700).

Almost surely, 2^15122922221 is an apocalyptic number.

15122922221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15122922221 is a deficient number, since it is larger than the sum of its proper divisors (1466979379).

15122922221 is a wasteful number, since it uses less digits than its factorization.

15122922221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7680699.

The product of its digits is 2880, while the sum is 29.

The spelling of 15122922221 in words is "fifteen billion, one hundred twenty-two million, nine hundred twenty-two thousand, two hundred twenty-one".