5215400121 has 16 divisors (see below), whose sum is σ = 7433193600. Its totient is φ = 3244644480.

The previous prime is 5215400093. The next prime is 5215400153. The reversal of 5215400121 is 1210045125.

It is not a de Polignac number, because 5215400121 - 2¹¹ = 5215398073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5215400171) 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, 918946 + ... + 924603.

It is an arithmetic number, because the mean of its divisors is an integer number (464574600).

Almost surely, 2^5215400121 is an apocalyptic number.

It is an amenable number.

5215400121 is a deficient number, since it is larger than the sum of its proper divisors (2217793479).

5215400121 is a wasteful number, since it uses less digits than its factorization.

5215400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843616.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 5215400121 is about 72217.7271935361. The cubic root of 5215400121 is about 1734.1868054766.

Adding to 5215400121 its reverse (1210045125), we get a palindrome (6425445246).

The spelling of 5215400121 in words is "five billion, two hundred fifteen million, four hundred thousand, one hundred twenty-one".