121047125021 has 2 divisors, whose sum is σ = 121047125022. Its totient is φ = 121047125020.

The previous prime is 121047125011. The next prime is 121047125029. The reversal of 121047125021 is 120521740121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115064102521 + 5983022500 = 339211^2 + 77350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121047125021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121047125029) 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, 60523562510 + 60523562511.

It is an arithmetic number, because the mean of its divisors is an integer number (60523562511).

Almost surely, 2^121047125021 is an apocalyptic number.

It is an amenable number.

121047125021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121047125021 is an equidigital number, since it uses as much as digits as its factorization.

121047125021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 121047125021 its reverse (120521740121), we get a palindrome (241568865142).

The spelling of 121047125021 in words is "one hundred twenty-one billion, forty-seven million, one hundred twenty-five thousand, twenty-one".