15121150512020 has 96 divisors (see below), whose sum is σ = 36579835944960. Its totient is φ = 5143105497600.

The previous prime is 15121150511981. The next prime is 15121150512023. The reversal of 15121150512020 is 2021505112151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15121150512023) 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, 236602070 + ... + 236665970.

It is an arithmetic number, because the mean of its divisors is an integer number (381039957760).

Almost surely, 2^{15121150512020} is an apocalyptic number.

15121150512020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15121150512020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18289917972480).

15121150512020 is an abundant number, since it is smaller than the sum of its proper divisors (21458685432940).

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

15121150512020 is a wasteful number, since it uses less digits than its factorization.

15121150512020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77353 (or 77351 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 26.

Adding to 15121150512020 its reverse (2021505112151), we get a palindrome (17142655624171).

The spelling of 15121150512020 in words is "fifteen trillion, one hundred twenty-one billion, one hundred fifty million, five hundred twelve thousand, twenty".