11213212100 has 36 divisors (see below), whose sum is σ = 24342741444. Its totient is φ = 4483428480.

The previous prime is 11213212099. The next prime is 11213212169. The reversal of 11213212100 is 121231211.

It can be written as a sum of positive squares in 6 ways, for example, as 1568793664 + 9644418436 = 39608^2 + 98206^2 .

It is a super-2 number, since 2×11213212100² (a number of 21 digits) contains 22 as substring.

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, 233774 + ... + 277626.

Almost surely, 2^11213212100 is an apocalyptic number.

11213212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11213212100 is an abundant number, since it is smaller than the sum of its proper divisors (13129529344).

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

11213212100 is a wasteful number, since it uses less digits than its factorization.

11213212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46424 (or 46417 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11213212100 its reverse (121231211), we get a palindrome (11334443311).

The spelling of 11213212100 in words is "eleven billion, two hundred thirteen million, two hundred twelve thousand, one hundred".