1220111021101 has 8 divisors (see below), whose sum is σ = 1394424706304. Its totient is φ = 1045800363600.

The previous prime is 1220111021083. The next prime is 1220111021149. The reversal of 1220111021101 is 1011201110221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220111021101 - 2⁵ = 1220111021069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220111021191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184711 + ... + 1573003.

It is an arithmetic number, because the mean of its divisors is an integer number (174303088288).

Almost surely, 2^{1220111021101} is an apocalyptic number.

It is an amenable number.

1220111021101 is a deficient number, since it is larger than the sum of its proper divisors (174313685203).

1220111021101 is a wasteful number, since it uses less digits than its factorization.

1220111021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513851.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1220111021101 its reverse (1011201110221), we get a palindrome (2231312131322).

The spelling of 1220111021101 in words is "one trillion, two hundred twenty billion, one hundred eleven million, twenty-one thousand, one hundred one".