1220000212101 has 48 divisors (see below), whose sum is σ = 1883032598720. Its totient is φ = 700129267200.

The previous prime is 1220000212073. The next prime is 1220000212111. The reversal of 1220000212101 is 1012120000221.

It is not a de Polignac number, because 1220000212101 - 2⁶ = 1220000212037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220000212111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14116461 + ... + 14202621.

Almost surely, 2^{1220000212101} is an apocalyptic number.

1220000212101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220000212101 is a deficient number, since it is larger than the sum of its proper divisors (663032386619).

1220000212101 is a wasteful number, since it uses less digits than its factorization.

1220000212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88258 (or 88247 counting only the distinct ones).

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

Adding to 1220000212101 its reverse (1012120000221), we get a palindrome (2232120212322).

The spelling of 1220000212101 in words is "one trillion, two hundred twenty billion, two hundred twelve thousand, one hundred one".