1220101022111 has 4 divisors (see below), whose sum is σ = 1284316865400. Its totient is φ = 1155885178824.

The previous prime is 1220101022099. The next prime is 1220101022143. The reversal of 1220101022111 is 1112201010221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220101022111 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 (1220101022611) 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, 32107921616 + ... + 32107921653.

It is an arithmetic number, because the mean of its divisors is an integer number (321079216350).

Almost surely, 2^{1220101022111} is an apocalyptic number.

1220101022111 is a deficient number, since it is larger than the sum of its proper divisors (64215843289).

1220101022111 is an equidigital number, since it uses as much as digits as its factorization.

1220101022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64215843288.

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

Adding to 1220101022111 its reverse (1112201010221), we get a palindrome (2332302032332).

It can be divided in two parts, 12201010221 and 11, that multiplied together give a palindrome (134211112431).

The spelling of 1220101022111 in words is "one trillion, two hundred twenty billion, one hundred one million, twenty-two thousand, one hundred eleven".