1321202211013 has 4 divisors (see below), whose sum is σ = 1322036831808. Its totient is φ = 1320367590220.

The previous prime is 1321202211001. The next prime is 1321202211037. The reversal of 1321202211013 is 3101122021231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321202211013 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 (1321202211113) 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, 417308023 + ... + 417311188.

It is an arithmetic number, because the mean of its divisors is an integer number (330509207952).

Almost surely, 2^{1321202211013} is an apocalyptic number.

It is an amenable number.

1321202211013 is a deficient number, since it is larger than the sum of its proper divisors (834620795).

1321202211013 is an equidigital number, since it uses as much as digits as its factorization.

1321202211013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834620794.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1321202211013 its reverse (3101122021231), we get a palindrome (4422324232244).

The spelling of 1321202211013 in words is "one trillion, three hundred twenty-one billion, two hundred two million, two hundred eleven thousand, thirteen".