972121211220311 has 4 divisors (see below), whose sum is σ = 977210851069824. Its totient is φ = 967031571370800.

The previous prime is 972121211220251. The next prime is 972121211220337. The reversal of 972121211220311 is 113022112121279.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 972121211220311 - 2¹⁰ = 972121211219287 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 (972121211210311) 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, 2544819924470 + ... + 2544819924851.

It is an arithmetic number, because the mean of its divisors is an integer number (244302712767456).

Almost surely, 2^{972121211220311} is an apocalyptic number.

972121211220311 is a deficient number, since it is larger than the sum of its proper divisors (5089639849513).

972121211220311 is a wasteful number, since it uses less digits than its factorization.

972121211220311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089639849512.

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 972121211220311 in words is "nine hundred seventy-two trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, three hundred eleven".