220101212091 has 32 divisors (see below), whose sum is σ = 324422184960. Its totient is φ = 132024510464.

The previous prime is 220101212087. The next prime is 220101212119. The reversal of 220101212091 is 190212101022.

It is a cyclic number.

It is not a de Polignac number, because 220101212091 - 2² = 220101212087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220101211091) 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, 2086915 + ... + 2189843.

It is an arithmetic number, because the mean of its divisors is an integer number (10138193280).

Almost surely, 2^220101212091 is an apocalyptic number.

220101212091 is a deficient number, since it is larger than the sum of its proper divisors (104320972869).

220101212091 is a wasteful number, since it uses less digits than its factorization.

220101212091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104795.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 220101212091 in words is "two hundred twenty billion, one hundred one million, two hundred twelve thousand, ninety-one".