1197322021 has 16 divisors (see below), whose sum is σ = 1414970368. Its totient is φ = 991440000.

The previous prime is 1197322003. The next prime is 1197322067. The reversal of 1197322021 is 1202237911.

It is a cyclic number.

It is not a de Polignac number, because 1197322021 - 2²¹ = 1195224869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197322001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128521 + ... + 137521.

It is an arithmetic number, because the mean of its divisors is an integer number (88435648).

Almost surely, 2^1197322021 is an apocalyptic number.

It is an amenable number.

1197322021 is a deficient number, since it is larger than the sum of its proper divisors (217648347).

1197322021 is an equidigital number, since it uses as much as digits as its factorization.

1197322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9652.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1197322021 is about 34602.3412647179. The cubic root of 1197322021 is about 1061.8674867141.

Adding to 1197322021 its reverse (1202237911), we get a palindrome (2399559932).

The spelling of 1197322021 in words is "one billion, one hundred ninety-seven million, three hundred twenty-two thousand, twenty-one".