1200100022121 has 192 divisors, whose sum is σ = 2340268851200. Its totient is φ = 530439528960.

The previous prime is 1200100022089. The next prime is 1200100022129. The reversal of 1200100022121 is 1212200010021.

It is not a de Polignac number, because 1200100022121 - 2⁵ = 1200100022089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200100022097 and 1200100022106.

It is not an unprimeable number, because it can be changed into a prime (1200100022129) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 23196360 + ... + 23248038.

Almost surely, 2^{1200100022121} is an apocalyptic number.

1200100022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200100022121 is a deficient number, since it is larger than the sum of its proper divisors (1140168829079).

1200100022121 is a wasteful number, since it uses less digits than its factorization.

1200100022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51780 (or 51769 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200100022121 its reverse (1212200010021), we get a palindrome (2412300032142).

The spelling of 1200100022121 in words is "one trillion, two hundred billion, one hundred million, twenty-two thousand, one hundred twenty-one".