211111002220100 has 36 divisors (see below), whose sum is σ = 462164953380564. Its totient is φ = 83697105300480.

The previous prime is 211111002220093. The next prime is 211111002220121. The reversal of 211111002220100 is 1022200111112.

It can be written as a sum of positive squares in 6 ways, for example, as 48181145917696 + 162929856302404 = 6941264^2 + 12764398^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9341183489 + ... + 9341206088.

Almost surely, 2^{211111002220100} is an apocalyptic number.

211111002220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211111002220100 is an abundant number, since it is smaller than the sum of its proper divisors (251053951160464).

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

211111002220100 is a wasteful number, since it uses less digits than its factorization.

211111002220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18682389704 (or 18682389697 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211111002220100 its reverse (1022200111112), we get a palindrome (212133202331212).

The spelling of 211111002220100 in words is "two hundred eleven trillion, one hundred eleven billion, two million, two hundred twenty thousand, one hundred".