11222551900 has 144 divisors (see below), whose sum is σ = 28554172416. Its totient is φ = 3748654080.

The previous prime is 11222551891. The next prime is 11222551919. The reversal of 11222551900 is 915522211.

It is a super-2 number, since 2×11222551900² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8652052 + ... + 8653348.

It is an arithmetic number, because the mean of its divisors is an integer number (198292864).

Almost surely, 2^11222551900 is an apocalyptic number.

11222551900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11222551900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14277086208).

11222551900 is an abundant number, since it is smaller than the sum of its proper divisors (17331620516).

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

11222551900 is a wasteful number, since it uses less digits than its factorization.

11222551900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628 (or 1621 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 11222551900 in words is "eleven billion, two hundred twenty-two million, five hundred fifty-one thousand, nine hundred".