121100212120957 has 2 divisors, whose sum is σ = 121100212120958. Its totient is φ = 121100212120956.

The previous prime is 121100212120913. The next prime is 121100212121023. The reversal of 121100212120957 is 759021212001121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119333317192441 + 1766894928516 = 10923979^2 + 1329246^2 .

It is an emirp because it is prime and its reverse (759021212001121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121100212120957 - 2⁴³ = 112304119098749 is a prime.

It is a super-2 number, since 2×121100212120957² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121100212130957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550106060478 + 60550106060479.

It is an arithmetic number, because the mean of its divisors is an integer number (60550106060479).

Almost surely, 2^{121100212120957} is an apocalyptic number.

It is an amenable number.

121100212120957 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100212120957 is an equidigital number, since it uses as much as digits as its factorization.

121100212120957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 34.

The spelling of 121100212120957 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twelve million, one hundred twenty thousand, nine hundred fifty-seven".