1201122211100 has 72 divisors (see below), whose sum is σ = 2983033636128. Its totient is φ = 411225696000.

The previous prime is 1201122211099. The next prime is 1201122211141. The reversal of 1201122211100 is 11122211021.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 733187 + ... + 1714586.

It is an arithmetic number, because the mean of its divisors is an integer number (41431022724).

Almost surely, 2^{1201122211100} is an apocalyptic number.

1201122211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201122211100 is an abundant number, since it is smaller than the sum of its proper divisors (1781911425028).

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

1201122211100 is a wasteful number, since it uses less digits than its factorization.

1201122211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448495 (or 2448488 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201122211100 its reverse (11122211021), we get a palindrome (1212244422121).

The spelling of 1201122211100 in words is "one trillion, two hundred one billion, one hundred twenty-two million, two hundred eleven thousand, one hundred".