210220211091 has 16 divisors (see below), whose sum is σ = 305855948160. Its totient is φ = 127372398720.

The previous prime is 210220211077. The next prime is 210220211093. The reversal of 210220211091 is 190112022012.

It is not a de Polignac number, because 210220211091 - 2⁹ = 210220210579 is a prime.

It is a super-2 number, since 2×210220211091² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210220211093) 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, 718150 + ... + 967563.

It is an arithmetic number, because the mean of its divisors is an integer number (19115996760).

Almost surely, 2^210220211091 is an apocalyptic number.

210220211091 is a deficient number, since it is larger than the sum of its proper divisors (95635737069).

210220211091 is a wasteful number, since it uses less digits than its factorization.

210220211091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689506.

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

The spelling of 210220211091 in words is "two hundred ten billion, two hundred twenty million, two hundred eleven thousand, ninety-one".