1211051502513 has 12 divisors (see below), whose sum is σ = 1750882573440. Its totient is φ = 806635687416.

The previous prime is 1211051502481. The next prime is 1211051502539. The reversal of 1211051502513 is 3152051501121.

It is a happy number.

1211051502513 is a `hidden beast` number, since 1 + 2 + 1 + 105 + 1 + 502 + 51 + 3 = 666.

It is not a de Polignac number, because 1211051502513 - 2⁵ = 1211051502481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211051502413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60987933 + ... + 61007786.

It is an arithmetic number, because the mean of its divisors is an integer number (145906881120).

Almost surely, 2^{1211051502513} is an apocalyptic number.

It is an amenable number.

1211051502513 is a deficient number, since it is larger than the sum of its proper divisors (539831070927).

1211051502513 is a wasteful number, since it uses less digits than its factorization.

1211051502513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121996828 (or 121996825 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The spelling of 1211051502513 in words is "one trillion, two hundred eleven billion, fifty-one million, five hundred two thousand, five hundred thirteen".