1202121023 has 2 divisors, whose sum is σ = 1202121024. Its totient is φ = 1202121022.

The previous prime is 1202121001. The next prime is 1202121049. The reversal of 1202121023 is 3201212021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1202121023 - 2¹⁰ = 1202119999 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202120989 and 1202121007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202124023) 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, 601060511 + 601060512.

It is an arithmetic number, because the mean of its divisors is an integer number (601060512).

Almost surely, 2^1202121023 is an apocalyptic number.

1202121023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202121023 is an equidigital number, since it uses as much as digits as its factorization.

1202121023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1202121023 is about 34671.6169654661. The cubic root of 1202121023 is about 1063.2842904654.

Adding to 1202121023 its reverse (3201212021), we get a palindrome (4403333044).

The spelling of 1202121023 in words is "one billion, two hundred two million, one hundred twenty-one thousand, twenty-three".