2111221333100 has 72 divisors (see below), whose sum is σ = 4999154627376. Its totient is φ = 767514400000.

The previous prime is 2111221333099. The next prime is 2111221333201. The reversal of 2111221333100 is 13331221112.

It is a happy number.

It is a super-2 number, since 2×2111221333100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3951950 + ... + 4454250.

It is an arithmetic number, because the mean of its divisors is an integer number (69432703158).

Almost surely, 2^{2111221333100} is an apocalyptic number.

2111221333100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111221333100 is an abundant number, since it is smaller than the sum of its proper divisors (2887933294276).

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

2111221333100 is a wasteful number, since it uses less digits than its factorization.

2111221333100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506147 (or 506140 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2111221333100 its reverse (13331221112), we get a palindrome (2124552554212).

The spelling of 2111221333100 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, three hundred thirty-three thousand, one hundred".