121644785051 has 2 divisors, whose sum is σ = 121644785052. Its totient is φ = 121644785050.

The previous prime is 121644785039. The next prime is 121644785209. The reversal of 121644785051 is 150587446121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121644785051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121644784993 and 121644785011.

It is not a weakly prime, because it can be changed into another prime (121644785021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60822392525 + 60822392526.

It is an arithmetic number, because the mean of its divisors is an integer number (60822392526).

Almost surely, 2^121644785051 is an apocalyptic number.

121644785051 is a deficient number, since it is larger than the sum of its proper divisors (1).

121644785051 is an equidigital number, since it uses as much as digits as its factorization.

121644785051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 121644785051 in words is "one hundred twenty-one billion, six hundred forty-four million, seven hundred eighty-five thousand, fifty-one".