1121521015 has 16 divisors (see below), whose sum is σ = 1354066560. Its totient is φ = 891740160.

The previous prime is 1121521013. The next prime is 1121521019. The reversal of 1121521015 is 5101251211.

It is not a de Polignac number, because 1121521015 - 2¹ = 1121521013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121520983 and 1121521001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121521013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 910450 + ... + 911680.

It is an arithmetic number, because the mean of its divisors is an integer number (84629160).

Almost surely, 2^1121521015 is an apocalyptic number.

1121521015 is a deficient number, since it is larger than the sum of its proper divisors (232545545).

1121521015 is a wasteful number, since it uses less digits than its factorization.

1121521015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202.

The product of its (nonzero) digits is 100, while the sum is 19.

The square root of 1121521015 is about 33489.1178593883. The cubic root of 1121521015 is about 1038.9687185180.

Adding to 1121521015 its reverse (5101251211), we get a palindrome (6222772226).

The spelling of 1121521015 in words is "one billion, one hundred twenty-one million, five hundred twenty-one thousand, fifteen".