1220101122101 has 4 divisors (see below), whose sum is σ = 1220111746092. Its totient is φ = 1220090498112.

The previous prime is 1220101122091. The next prime is 1220101122133. The reversal of 1220101122101 is 1012211010221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 873568753201 + 346532368900 = 934649^2 + 588670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220101122101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220101122151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5137826 + ... + 5370051.

It is an arithmetic number, because the mean of its divisors is an integer number (305027936523).

Almost surely, 2^{1220101122101} is an apocalyptic number.

It is an amenable number.

1220101122101 is a deficient number, since it is larger than the sum of its proper divisors (10623991).

1220101122101 is a wasteful number, since it uses less digits than its factorization.

1220101122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10623990.

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

Adding to 1220101122101 its reverse (1012211010221), we get a palindrome (2232312132322).

The spelling of 1220101122101 in words is "one trillion, two hundred twenty billion, one hundred one million, one hundred twenty-two thousand, one hundred one".