1220001111101 has 24 divisors (see below), whose sum is σ = 1267208639424. Its totient is φ = 1173750821760.

The previous prime is 1220001111071. The next prime is 1220001111113. The reversal of 1220001111101 is 1011111000221.

It is a de Polignac number, because none of the positive numbers 2^k-1220001111101 is a prime.

It is a super-2 number, since 2×1220001111101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220001111151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230056016 + ... + 230061318.

It is an arithmetic number, because the mean of its divisors is an integer number (52800359976).

Almost surely, 2^{1220001111101} is an apocalyptic number.

It is an amenable number.

1220001111101 is a deficient number, since it is larger than the sum of its proper divisors (47207528323).

1220001111101 is an equidigital number, since it uses as much as digits as its factorization.

1220001111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5909 (or 5680 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1220001111101 its reverse (1011111000221), we get a palindrome (2231112111322).

The spelling of 1220001111101 in words is "one trillion, two hundred twenty billion, one million, one hundred eleven thousand, one hundred one".