2115551020013 has 24 divisors (see below), whose sum is σ = 2334291951168. Its totient is φ = 1913397380928.

The previous prime is 2115551020001. The next prime is 2115551020027. The reversal of 2115551020013 is 3100201555112.

It is not a de Polignac number, because 2115551020013 - 2⁴ = 2115551019997 is a prime.

It is a super-2 number, since 2×2115551020013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115551020073) 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, 4098881 + ... + 4586057.

It is an arithmetic number, because the mean of its divisors is an integer number (97262164632).

Almost surely, 2^{2115551020013} is an apocalyptic number.

2115551020013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2115551020013 is a deficient number, since it is larger than the sum of its proper divisors (218740931155).

2115551020013 is a wasteful number, since it uses less digits than its factorization.

2115551020013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487761 (or 487742 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 2115551020013 its reverse (3100201555112), we get a palindrome (5215752575125).

The spelling of 2115551020013 in words is "two trillion, one hundred fifteen billion, five hundred fifty-one million, twenty thousand, thirteen".