972121223 has 2 divisors, whose sum is σ = 972121224. Its totient is φ = 972121222.

The previous prime is 972121211. The next prime is 972121231. The reversal of 972121223 is 322121279.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 972121223 - 2⁴ = 972121207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (972121273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486060611 + 486060612.

It is an arithmetic number, because the mean of its divisors is an integer number (486060612).

Almost surely, 2^972121223 is an apocalyptic number.

972121223 is a deficient number, since it is larger than the sum of its proper divisors (1).

972121223 is an equidigital number, since it uses as much as digits as its factorization.

972121223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

The square root of 972121223 is about 31178.8585903974. The cubic root of 972121223 is about 990.6193529491.

The spelling of 972121223 in words is "nine hundred seventy-two million, one hundred twenty-one thousand, two hundred twenty-three".