99121222201001 has 32 divisors (see below), whose sum is σ = 133091581663488. Its totient is φ = 71292906397440.

The previous prime is 99121222200997. The next prime is 99121222201039. The reversal of 99121222201001 is 10010222212199.

It is not a de Polignac number, because 99121222201001 - 2² = 99121222200997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99121222201081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21190715 + ... + 25441871.

It is an arithmetic number, because the mean of its divisors is an integer number (4159111926984).

Almost surely, 2^{99121222201001} is an apocalyptic number.

99121222201001 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

99121222201001 is a deficient number, since it is larger than the sum of its proper divisors (33970359462487).

99121222201001 is a wasteful number, since it uses less digits than its factorization.

99121222201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274481.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 99121222201001 in words is "ninety-nine trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred one thousand, one".