91220202101 has 8 divisors (see below), whose sum is σ = 104285216640. Its totient is φ = 78163576848.

The previous prime is 91220202049. The next prime is 91220202113. The reversal of 91220202101 is 10120202219.

It is a happy number.

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

It is not a de Polignac number, because 91220202101 - 2⁶ = 91220202037 is a prime.

It is a super-2 number, since 2×91220202101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91220202121) 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, 2074001 + ... + 2117526.

It is an arithmetic number, because the mean of its divisors is an integer number (13035652080).

Almost surely, 2^91220202101 is an apocalyptic number.

It is an amenable number.

91220202101 is a deficient number, since it is larger than the sum of its proper divisors (13065014539).

91220202101 is a wasteful number, since it uses less digits than its factorization.

91220202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194643.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 91220202101 in words is "ninety-one billion, two hundred twenty million, two hundred two thousand, one hundred one".