1220022212111 has 4 divisors (see below), whose sum is σ = 1220025073824. Its totient is φ = 1220019350400.

The previous prime is 1220022212107. The next prime is 1220022212119. The reversal of 1220022212111 is 1112122200221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220022212111 - 2² = 1220022212107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220022212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220022212119) 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, 648935 + ... + 1691496.

It is an arithmetic number, because the mean of its divisors is an integer number (305006268456).

Almost surely, 2^{1220022212111} is an apocalyptic number.

1220022212111 is a deficient number, since it is larger than the sum of its proper divisors (2861713).

1220022212111 is an equidigital number, since it uses as much as digits as its factorization.

1220022212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861712.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1220022212111 its reverse (1112122200221), we get a palindrome (2332144412332).

The spelling of 1220022212111 in words is "one trillion, two hundred twenty billion, twenty-two million, two hundred twelve thousand, one hundred eleven".