1220111120211 has 8 divisors (see below), whose sum is σ = 1635072771024. Its totient is φ = 809278441440.

The previous prime is 1220111120209. The next prime is 1220111120219. The reversal of 1220111120211 is 1120211110221.

It is a happy number.

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

It is not a de Polignac number, because 1220111120211 - 2¹ = 1220111120209 is a prime.

It is a super-2 number, since 2×1220111120211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220111120219) 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, 1032242320 + ... + 1032243501.

It is an arithmetic number, because the mean of its divisors is an integer number (204384096378).

Almost surely, 2^{1220111120211} is an apocalyptic number.

1220111120211 is a deficient number, since it is larger than the sum of its proper divisors (414961650813).

1220111120211 is a wasteful number, since it uses less digits than its factorization.

1220111120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064486021.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1220111120211 its reverse (1120211110221), we get a palindrome (2340322230432).

The spelling of 1220111120211 in words is "one trillion, two hundred twenty billion, one hundred eleven million, one hundred twenty thousand, two hundred eleven".