99120212120111 has 36 divisors (see below), whose sum is σ = 127275042428856. Its totient is φ = 76511982798720.

The previous prime is 99120212120107. The next prime is 99120212120131. The reversal of 99120212120111 is 11102121202199.

It is not a de Polignac number, because 99120212120111 - 2² = 99120212120107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99120212120131) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45212585 + ... + 47354178.

It is an arithmetic number, because the mean of its divisors is an integer number (3535417845246).

Almost surely, 2^{99120212120111} is an apocalyptic number.

99120212120111 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

99120212120111 is a deficient number, since it is larger than the sum of its proper divisors (28154830308745).

99120212120111 is a wasteful number, since it uses less digits than its factorization.

99120212120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92566872 (or 92566824 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 99120212120111 in words is "ninety-nine trillion, one hundred twenty billion, two hundred twelve million, one hundred twenty thousand, one hundred eleven".