121455025537 has 2 divisors, whose sum is σ = 121455025538. Its totient is φ = 121455025536.

The previous prime is 121455025507. The next prime is 121455025567. The reversal of 121455025537 is 735520554121.

It is a balanced prime because it is at equal distance from previous prime (121455025507) and next prime (121455025567).

It can be written as a sum of positive squares in only one way, i.e., 89913620736 + 31541404801 = 299856^2 + 177599^2 .

It is a cyclic number.

It is not a de Polignac number, because 121455025537 - 2²³ = 121446636929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121455025537.

It is not a weakly prime, because it can be changed into another prime (121455025507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60727512768 + 60727512769.

It is an arithmetic number, because the mean of its divisors is an integer number (60727512769).

Almost surely, 2^121455025537 is an apocalyptic number.

It is an amenable number.

121455025537 is a deficient number, since it is larger than the sum of its proper divisors (1).

121455025537 is an equidigital number, since it uses as much as digits as its factorization.

121455025537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210000, while the sum is 40.

Adding to 121455025537 its reverse (735520554121), we get a palindrome (856975579658).

The spelling of 121455025537 in words is "one hundred twenty-one billion, four hundred fifty-five million, twenty-five thousand, five hundred thirty-seven".