15040412121 has 32 divisors (see below), whose sum is σ = 23403854848. Its totient is φ = 8414176320.

The previous prime is 15040412119. The next prime is 15040412137. The reversal of 15040412121 is 12121404051.

It is not a de Polignac number, because 15040412121 - 2¹ = 15040412119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15040412921) 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, 196551 + ... + 262131.

It is an arithmetic number, because the mean of its divisors is an integer number (731370464).

Almost surely, 2^15040412121 is an apocalyptic number.

It is an amenable number.

15040412121 is a deficient number, since it is larger than the sum of its proper divisors (8363442727).

15040412121 is a wasteful number, since it uses less digits than its factorization.

15040412121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65821.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 15040412121 its reverse (12121404051), we get a palindrome (27161816172).

The spelling of 15040412121 in words is "fifteen billion, forty million, four hundred twelve thousand, one hundred twenty-one".