972270121 has 2 divisors, whose sum is σ = 972270122. Its totient is φ = 972270120.

The previous prime is 972270067. The next prime is 972270149. The reversal of 972270121 is 121072279.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679175721 + 293094400 = 26061^2 + 17120^2 .

It is an emirp because it is prime and its reverse (121072279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 972270121 - 2²¹ = 970172969 is a prime.

It is not a weakly prime, because it can be changed into another prime (972270151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486135060 + 486135061.

It is an arithmetic number, because the mean of its divisors is an integer number (486135061).

Almost surely, 2^972270121 is an apocalyptic number.

It is an amenable number.

972270121 is a deficient number, since it is larger than the sum of its proper divisors (1).

972270121 is an equidigital number, since it uses as much as digits as its factorization.

972270121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 972270121 is about 31181.2463028661. The cubic root of 972270121 is about 990.6699274751.

The spelling of 972270121 in words is "nine hundred seventy-two million, two hundred seventy thousand, one hundred twenty-one".