99955771726121 has 8 divisors (see below), whose sum is σ = 104877927196224. Its totient is φ = 95081637285360.

The previous prime is 99955771726117. The next prime is 99955771726123. The reversal of 99955771726121 is 12162717755999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99955771726121 - 2² = 99955771726117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99955771726123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12005253071 + ... + 12005261396.

It is an arithmetic number, because the mean of its divisors is an integer number (13109740899528).

Almost surely, 2^{99955771726121} is an apocalyptic number.

It is an amenable number.

99955771726121 is a deficient number, since it is larger than the sum of its proper divisors (4922155470103).

99955771726121 is a wasteful number, since it uses less digits than its factorization.

99955771726121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24010514671.

The product of its digits is 150028200, while the sum is 71.

The spelling of 99955771726121 in words is "ninety-nine trillion, nine hundred fifty-five billion, seven hundred seventy-one million, seven hundred twenty-six thousand, one hundred twenty-one".