2121012313015 has 4 divisors (see below), whose sum is σ = 2545214775624. Its totient is φ = 1696809850408.

The previous prime is 2121012313003. The next prime is 2121012313039. The reversal of 2121012313015 is 5103132101212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121012313015 is a prime.

It is a super-2 number, since 2×2121012313015² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212101231297 + ... + 212101231306.

It is an arithmetic number, because the mean of its divisors is an integer number (636303693906).

Almost surely, 2^{2121012313015} is an apocalyptic number.

2121012313015 is a deficient number, since it is larger than the sum of its proper divisors (424202462609).

2121012313015 is an equidigital number, since it uses as much as digits as its factorization.

2121012313015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424202462608.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 2121012313015 its reverse (5103132101212), we get a palindrome (7224144414227).

The spelling of 2121012313015 in words is "two trillion, one hundred twenty-one billion, twelve million, three hundred thirteen thousand, fifteen".