120121231357 has 2 divisors, whose sum is σ = 120121231358. Its totient is φ = 120121231356.

The previous prime is 120121231297. The next prime is 120121231397. The reversal of 120121231357 is 753132121021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70932201561 + 49189029796 = 266331^2 + 221786^2 .

It is a cyclic number.

It is not a de Polignac number, because 120121231357 - 2⁷ = 120121231229 is a prime.

It is a super-2 number, since 2×120121231357² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120121231397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060615678 + 60060615679.

It is an arithmetic number, because the mean of its divisors is an integer number (60060615679).

Almost surely, 2^120121231357 is an apocalyptic number.

It is an amenable number.

120121231357 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121231357 is an equidigital number, since it uses as much as digits as its factorization.

120121231357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

Adding to 120121231357 its reverse (753132121021), we get a palindrome (873253352378).

The spelling of 120121231357 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred thirty-one thousand, three hundred fifty-seven".