1202113021 has 2 divisors, whose sum is σ = 1202113022. Its totient is φ = 1202113020.

The previous prime is 1202113013. The next prime is 1202113051. The reversal of 1202113021 is 1203112021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 638572900 + 563540121 = 25270^2 + 23739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202113021 - 2³ = 1202113013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202112992 and 1202113010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202113001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601056510 + 601056511.

It is an arithmetic number, because the mean of its divisors is an integer number (601056511).

Almost surely, 2^1202113021 is an apocalyptic number.

It is an amenable number.

1202113021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202113021 is an equidigital number, since it uses as much as digits as its factorization.

1202113021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1202113021 is about 34671.5015682909. The cubic root of 1202113021 is about 1063.2819311855.

Adding to 1202113021 its reverse (1203112021), we get a palindrome (2405225042).

The spelling of 1202113021 in words is "one billion, two hundred two million, one hundred thirteen thousand, twenty-one".