1213001120311 has 4 divisors (see below), whose sum is σ = 1231105614712. Its totient is φ = 1194896625912.

The previous prime is 1213001120299. The next prime is 1213001120327. The reversal of 1213001120311 is 1130211003121.

It is a happy number.

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-1213001120311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213001120371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9052247100 + ... + 9052247233.

It is an arithmetic number, because the mean of its divisors is an integer number (307776403678).

Almost surely, 2^{1213001120311} is an apocalyptic number.

1213001120311 is a deficient number, since it is larger than the sum of its proper divisors (18104494401).

1213001120311 is an equidigital number, since it uses as much as digits as its factorization.

1213001120311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18104494400.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1213001120311 its reverse (1130211003121), we get a palindrome (2343212123432).

The spelling of 1213001120311 in words is "one trillion, two hundred thirteen billion, one million, one hundred twenty thousand, three hundred eleven".