5215220121 has 8 divisors (see below), whose sum is σ = 6995265984. Its totient is φ = 3455993840.

The previous prime is 5215220119. The next prime is 5215220161. The reversal of 5215220121 is 1210225125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5215220121 - 2¹ = 5215220119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5215220161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5204310 + ... + 5205311.

It is an arithmetic number, because the mean of its divisors is an integer number (874408248).

Almost surely, 2^5215220121 is an apocalyptic number.

It is an amenable number.

5215220121 is a deficient number, since it is larger than the sum of its proper divisors (1780045863).

5215220121 is a wasteful number, since it uses less digits than its factorization.

5215220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10409791.

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

The square root of 5215220121 is about 72216.4809513729. The cubic root of 5215220121 is about 1734.1668544848.

Adding to 5215220121 its reverse (1210225125), we get a palindrome (6425445246).

The spelling of 5215220121 in words is "five billion, two hundred fifteen million, two hundred twenty thousand, one hundred twenty-one".