5213521121 has 32 divisors (see below), whose sum is σ = 5707389600. Its totient is φ = 4744396800.

The previous prime is 5213521109. The next prime is 5213521129. The reversal of 5213521121 is 1211253125.

It can be written as a sum of positive squares in 16 ways, for example, as 679384225 + 4534136896 = 26065^2 + 67336^2 .

It is a cyclic number.

It is not a de Polignac number, because 5213521121 - 2⁶ = 5213521057 is a prime.

It is a super-2 number, since 2×5213521121² = 54361604958226193282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5213521129) 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, 16656461 + ... + 16656773.

It is an arithmetic number, because the mean of its divisors is an integer number (178355925).

Almost surely, 2^5213521121 is an apocalyptic number.

It is an amenable number.

5213521121 is a deficient number, since it is larger than the sum of its proper divisors (493868479).

5213521121 is a wasteful number, since it uses less digits than its factorization.

5213521121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629.

The product of its digits is 600, while the sum is 23.

The square root of 5213521121 is about 72204.7167503620. The cubic root of 5213521121 is about 1733.9785166693.

Adding to 5213521121 its reverse (1211253125), we get a palindrome (6424774246).

The spelling of 5213521121 in words is "five billion, two hundred thirteen million, five hundred twenty-one thousand, one hundred twenty-one".