1220020022111 has 4 divisors (see below), whose sum is σ = 1330930933224. Its totient is φ = 1109109111000.

The previous prime is 1220020022041. The next prime is 1220020022119. The reversal of 1220020022111 is 1112200200221.

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

It is not a de Polignac number, because 1220020022111 - 2²⁶ = 1219952913247 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 (1220020022119) 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, 55455455540 + ... + 55455455561.

It is an arithmetic number, because the mean of its divisors is an integer number (332732733306).

Almost surely, 2^{1220020022111} is an apocalyptic number.

1220020022111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220020022111 is a deficient number, since it is larger than the sum of its proper divisors (110910911113).

1220020022111 is a wasteful number, since it uses less digits than its factorization.

1220020022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110910911112.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220020022111 its reverse (1112200200221), we get a palindrome (2332220222332).

It can be divided in two parts, 12200200221 and 11, that multiplied together give a palindrome (134202202431).

The spelling of 1220020022111 in words is "one trillion, two hundred twenty billion, twenty million, twenty-two thousand, one hundred eleven".