12201022121100 has 36 divisors (see below), whose sum is σ = 35301624004584. Its totient is φ = 3253605898880.

The previous prime is 12201022121069. The next prime is 12201022121107. The reversal of 12201022121100 is 112122010221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12201022121100.

It is not an unprimeable number, because it can be changed into a prime (12201022121107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20335036569 + ... + 20335037168.

It is an arithmetic number, because the mean of its divisors is an integer number (980600666794).

Almost surely, 2^{12201022121100} is an apocalyptic number.

12201022121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12201022121100 is an abundant number, since it is smaller than the sum of its proper divisors (23100601883484).

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

12201022121100 is a wasteful number, since it uses less digits than its factorization.

12201022121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40670073754 (or 40670073747 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12201022121100 its reverse (112122010221), we get a palindrome (12313144131321).

The spelling of 12201022121100 in words is "twelve trillion, two hundred one billion, twenty-two million, one hundred twenty-one thousand, one hundred".