2121031301313 has 16 divisors (see below), whose sum is σ = 2951157381120. Its totient is φ = 1352469599184.

The previous prime is 2121031301303. The next prime is 2121031301327. The reversal of 2121031301313 is 3131031301212.

It is a happy number.

It is not a de Polignac number, because 2121031301313 - 2⁴ = 2121031301297 is a prime.

It is a super-2 number, since 2×2121031301313² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121031301313.

It is not an unprimeable number, because it can be changed into a prime (2121031301303) 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, 499720 + ... + 2119382.

It is an arithmetic number, because the mean of its divisors is an integer number (184447336320).

Almost surely, 2^{2121031301313} is an apocalyptic number.

2121031301313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2121031301313 is a deficient number, since it is larger than the sum of its proper divisors (830126079807).

2121031301313 is a wasteful number, since it uses less digits than its factorization.

2121031301313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638668.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 2121031301313 its reverse (3131031301212), we get a palindrome (5252062602525).

The spelling of 2121031301313 in words is "two trillion, one hundred twenty-one billion, thirty-one million, three hundred one thousand, three hundred thirteen".