121361204537 has 2 divisors, whose sum is σ = 121361204538. Its totient is φ = 121361204536.

The previous prime is 121361204513. The next prime is 121361204581. The reversal of 121361204537 is 735402163121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63919974976 + 57441229561 = 252824^2 + 239669^2 .

It is a cyclic number.

It is not a de Polignac number, because 121361204537 - 2²² = 121357010233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121361204497 and 121361204506.

It is not a weakly prime, because it can be changed into another prime (121361204837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60680602268 + 60680602269.

It is an arithmetic number, because the mean of its divisors is an integer number (60680602269).

Almost surely, 2^121361204537 is an apocalyptic number.

It is an amenable number.

121361204537 is a deficient number, since it is larger than the sum of its proper divisors (1).

121361204537 is an equidigital number, since it uses as much as digits as its factorization.

121361204537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

Adding to 121361204537 its reverse (735402163121), we get a palindrome (856763367658).

The spelling of 121361204537 in words is "one hundred twenty-one billion, three hundred sixty-one million, two hundred four thousand, five hundred thirty-seven".