97912012122121 has 4 divisors (see below), whose sum is σ = 97914387918852. Its totient is φ = 97909636325392.

The previous prime is 97912012122101. The next prime is 97912012122167. The reversal of 97912012122121 is 12122121021979.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61092419674896 + 36819592447225 = 7816164^2 + 6067915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97912012122121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97912012122101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187836546 + ... + 1187918971.

It is an arithmetic number, because the mean of its divisors is an integer number (24478596979713).

Almost surely, 2^{97912012122121} is an apocalyptic number.

It is an amenable number.

97912012122121 is a deficient number, since it is larger than the sum of its proper divisors (2375796731).

97912012122121 is a wasteful number, since it uses less digits than its factorization.

97912012122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375796730.

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 97912012122121 in words is "ninety-seven trillion, nine hundred twelve billion, twelve million, one hundred twenty-two thousand, one hundred twenty-one".