1216210113513 has 24 divisors (see below), whose sum is σ = 1838839006368. Its totient is φ = 803229092064.

The previous prime is 1216210113479. The next prime is 1216210113541. The reversal of 1216210113513 is 3153110126121.

1216210113513 is a `hidden beast` number, since 1 + 2 + 1 + 621 + 0 + 1 + 1 + 35 + 1 + 3 = 666.

It is not a de Polignac number, because 1216210113513 - 2¹⁴ = 1216210097129 is a prime.

It is a super-2 number, since 2×1216210113513² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1216210111513) 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, 23361756 + ... + 23413757.

It is an arithmetic number, because the mean of its divisors is an integer number (76618291932).

Almost surely, 2^{1216210113513} is an apocalyptic number.

It is an amenable number.

1216210113513 is a deficient number, since it is larger than the sum of its proper divisors (622628892855).

1216210113513 is an equidigital number, since it uses as much as digits as its factorization.

1216210113513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46775635 (or 46775623 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 1216210113513 its reverse (3153110126121), we get a palindrome (4369320239634).

The spelling of 1216210113513 in words is "one trillion, two hundred sixteen billion, two hundred ten million, one hundred thirteen thousand, five hundred thirteen".