1321201313211 has 32 divisors (see below), whose sum is σ = 1979850539520. Its totient is φ = 777595762944.

The previous prime is 1321201313183. The next prime is 1321201313239. The reversal of 1321201313211 is 1123131021231.

It is an interprime number because it is at equal distance from previous prime (1321201313183) and next prime (1321201313239).

It is not a de Polignac number, because 1321201313211 - 2¹⁴ = 1321201296827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321201318211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7092120 + ... + 7276026.

It is an arithmetic number, because the mean of its divisors is an integer number (61870329360).

Almost surely, 2^{1321201313211} is an apocalyptic number.

1321201313211 is a deficient number, since it is larger than the sum of its proper divisors (658649226309).

1321201313211 is a wasteful number, since it uses less digits than its factorization.

1321201313211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191955.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1321201313211 its reverse (1123131021231), we get a palindrome (2444332334442).

The spelling of 1321201313211 in words is "one trillion, three hundred twenty-one billion, two hundred one million, three hundred thirteen thousand, two hundred eleven".