1220100200121 has 32 divisors (see below), whose sum is σ = 1777533843456. Its totient is φ = 738270936000.

The previous prime is 1220100200089. The next prime is 1220100200173. The reversal of 1220100200121 is 1210020010221.

It is not a de Polignac number, because 1220100200121 - 2⁵ = 1220100200089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220100200097 and 1220100200106.

It is not an unprimeable number, because it can be changed into a prime (1220100200321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91174851 + ... + 91188231.

It is an arithmetic number, because the mean of its divisors is an integer number (55547932608).

Almost surely, 2^{1220100200121} is an apocalyptic number.

1220100200121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220100200121 is a deficient number, since it is larger than the sum of its proper divisors (557433643335).

1220100200121 is a wasteful number, since it uses less digits than its factorization.

1220100200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17613.

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

Adding to 1220100200121 its reverse (1210020010221), we get a palindrome (2430120210342).

The spelling of 1220100200121 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred thousand, one hundred twenty-one".