221020120120111 has 32 divisors (see below), whose sum is σ = 244818568789760. Its totient is φ = 198354183775488.

The previous prime is 221020120120049. The next prime is 221020120120133. The reversal of 221020120120111 is 111021021020122.

It is not a de Polignac number, because 221020120120111 - 2³¹ = 221017972636463 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 (221020120120141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 873688435 + ... + 873941371.

It is an arithmetic number, because the mean of its divisors is an integer number (7650580274680).

Almost surely, 2^{221020120120111} is an apocalyptic number.

221020120120111 is a deficient number, since it is larger than the sum of its proper divisors (23798448669649).

221020120120111 is an equidigital number, since it uses as much as digits as its factorization.

221020120120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254388 (or 254314 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221020120120111 its reverse (111021021020122), we get a palindrome (332041141140233).

The spelling of 221020120120111 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty million, one hundred twenty thousand, one hundred eleven".