2101100222220 has 96 divisors (see below), whose sum is σ = 5915482949376. Its totient is φ = 557214240000.

The previous prime is 2101100222159. The next prime is 2101100222231. The reversal of 2101100222220 is 222220011012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2101100222220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9849127 + ... + 10060193.

It is an arithmetic number, because the mean of its divisors is an integer number (61619614056).

Almost surely, 2^{2101100222220} is an apocalyptic number.

2101100222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101100222220 is an abundant number, since it is smaller than the sum of its proper divisors (3814382727156).

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

2101100222220 is a wasteful number, since it uses less digits than its factorization.

2101100222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211991 (or 211989 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2101100222220 its reverse (222220011012), we get a palindrome (2323320233232).

The spelling of 2101100222220 in words is "two trillion, one hundred one billion, one hundred million, two hundred twenty-two thousand, two hundred twenty".