2121201315 has 24 divisors (see below), whose sum is σ = 3699318480. Its totient is φ = 1124362944.

The previous prime is 2121201311. The next prime is 2121201323. The reversal of 2121201315 is 5131021212.

It is not a de Polignac number, because 2121201315 - 2² = 2121201311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121201311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137260 + ... + 151929.

It is an arithmetic number, because the mean of its divisors is an integer number (154138270).

Almost surely, 2^2121201315 is an apocalyptic number.

2121201315 is a deficient number, since it is larger than the sum of its proper divisors (1578117165).

2121201315 is a wasteful number, since it uses less digits than its factorization.

2121201315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289363 (or 289360 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 2121201315 is about 46056.5013326023. The cubic root of 2121201315 is about 1284.8742608373.

Adding to 2121201315 its reverse (5131021212), we get a palindrome (7252222527).

The spelling of 2121201315 in words is "two billion, one hundred twenty-one million, two hundred one thousand, three hundred fifteen".