91101200101212 has 48 divisors (see below), whose sum is σ = 242940625320960. Its totient is φ = 26028475916352.

The previous prime is 91101200101211. The next prime is 91101200101229. The reversal of 91101200101212 is 21210100210119.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91101200101211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4099887 + ... + 14107142.

It is an arithmetic number, because the mean of its divisors is an integer number (5061263027520).

Almost surely, 2^{91101200101212} is an apocalyptic number.

It is an amenable number.

91101200101212 is an abundant number, since it is smaller than the sum of its proper divisors (151839425219748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91101200101212 is a wasteful number, since it uses less digits than its factorization.

91101200101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18266610 (or 18266608 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 91101200101212 in words is "ninety-one trillion, one hundred one billion, two hundred million, one hundred one thousand, two hundred twelve".