1220120210101 has 64 divisors (see below), whose sum is σ = 1413560332800. Its totient is φ = 1044351221760.

The previous prime is 1220120210093. The next prime is 1220120210143. The reversal of 1220120210101 is 1010120210221.

It is a cyclic number.

It is not a de Polignac number, because 1220120210101 - 2³ = 1220120210093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220120280101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1391242675 + ... + 1391243551.

It is an arithmetic number, because the mean of its divisors is an integer number (22086880200).

Almost surely, 2^{1220120210101} is an apocalyptic number.

It is an amenable number.

1220120210101 is a deficient number, since it is larger than the sum of its proper divisors (193440122699).

1220120210101 is a wasteful number, since it uses less digits than its factorization.

1220120210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220120210101 its reverse (1010120210221), we get a palindrome (2230240420322).

The spelling of 1220120210101 in words is "one trillion, two hundred twenty billion, one hundred twenty million, two hundred ten thousand, one hundred one".