1013001215121 has 80 divisors (see below), whose sum is σ = 1769843496960. Its totient is φ = 565380557280.

The previous prime is 1013001215119. The next prime is 1013001215129. The reversal of 1013001215121 is 1215121003101.

1013001215121 is a `hidden beast` number, since 1 + 0 + 1 + 30 + 0 + 121 + 512 + 1 = 666.

It is not a de Polignac number, because 1013001215121 - 2¹ = 1013001215119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1013001215094 and 1013001215103.

It is not an unprimeable number, because it can be changed into a prime (1013001215129) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13045950 + ... + 13123368.

It is an arithmetic number, because the mean of its divisors is an integer number (22123043712).

Almost surely, 2^{1013001215121} is an apocalyptic number.

It is an amenable number.

1013001215121 is a deficient number, since it is larger than the sum of its proper divisors (756842281839).

1013001215121 is an equidigital number, since it uses as much as digits as its factorization.

1013001215121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77976 (or 77967 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

Adding to 1013001215121 its reverse (1215121003101), we get a palindrome (2228122218222).

The spelling of 1013001215121 in words is "one trillion, thirteen billion, one million, two hundred fifteen thousand, one hundred twenty-one".