15151420121 has 8 divisors (see below), whose sum is σ = 15221184480. Its totient is φ = 15081770592.

The previous prime is 15151420091. The next prime is 15151420171. The reversal of 15151420121 is 12102415151.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 15151420121 - 2¹⁰ = 15151419097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15151420171) 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, 241610 + ... + 297788.

It is an arithmetic number, because the mean of its divisors is an integer number (1902648060).

Almost surely, 2^15151420121 is an apocalyptic number.

It is an amenable number.

15151420121 is a deficient number, since it is larger than the sum of its proper divisors (69764359).

15151420121 is an equidigital number, since it uses as much as digits as its factorization.

15151420121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57415.

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 15151420121 its reverse (12102415151), we get a palindrome (27253835272).

The spelling of 15151420121 in words is "fifteen billion, one hundred fifty-one million, four hundred twenty thousand, one hundred twenty-one".