1220011220101 has 4 divisors (see below), whose sum is σ = 1220062619232. Its totient is φ = 1219959820972.

The previous prime is 1220011220053. The next prime is 1220011220137. The reversal of 1220011220101 is 1010221100221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220011220101 - 2¹⁷ = 1220011089029 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 (1220011224101) 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 3 ways as a sum of consecutive naturals, for example, 25663945 + ... + 25711438.

It is an arithmetic number, because the mean of its divisors is an integer number (305015654808).

Almost surely, 2^{1220011220101} is an apocalyptic number.

It is an amenable number.

1220011220101 is a deficient number, since it is larger than the sum of its proper divisors (51399131).

1220011220101 is an equidigital number, since it uses as much as digits as its factorization.

1220011220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51399130.

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

Adding to 1220011220101 its reverse (1010221100221), we get a palindrome (2230232320322).

The spelling of 1220011220101 in words is "one trillion, two hundred twenty billion, eleven million, two hundred twenty thousand, one hundred one".