12211001100 has 90 divisors (see below), whose sum is σ = 39583267724. Its totient is φ = 3256264800.

The previous prime is 12211001083. The next prime is 12211001123. The reversal of 12211001100 is 110011221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 745666 + ... + 761865.

Almost surely, 2^12211001100 is an apocalyptic number.

12211001100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211001100 is an abundant number, since it is smaller than the sum of its proper divisors (27372266624).

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

12211001100 is a wasteful number, since it uses less digits than its factorization.

12211001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507557 (or 1507541 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12211001100 its reverse (110011221), we get a palindrome (12321012321).

The spelling of 12211001100 in words is "twelve billion, two hundred eleven million, one thousand, one hundred".