1220222111101 has 4 divisors (see below), whose sum is σ = 1394539555552. Its totient is φ = 1045904666652.

The previous prime is 1220222111057. The next prime is 1220222111189. The reversal of 1220222111101 is 1011112220221.

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 1220222111101 - 2²³ = 1220213722493 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 (1220232111101) 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, 87158722215 + ... + 87158722228.

It is an arithmetic number, because the mean of its divisors is an integer number (348634888888).

Almost surely, 2^{1220222111101} is an apocalyptic number.

It is an amenable number.

1220222111101 is a deficient number, since it is larger than the sum of its proper divisors (174317444451).

1220222111101 is an equidigital number, since it uses as much as digits as its factorization.

1220222111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174317444450.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1220222111101 its reverse (1011112220221), we get a palindrome (2231334331322).

The spelling of 1220222111101 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred eleven thousand, one hundred one".