220121132111 has 4 divisors (see below), whose sum is σ = 227221813824. Its totient is φ = 213020450400.

The previous prime is 220121132107. The next prime is 220121132131. The reversal of 220121132111 is 111231121022.

It is a happy number.

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 220121132111 - 2² = 220121132107 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 220121132111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121132131) 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, 3550340810 + ... + 3550340871.

It is an arithmetic number, because the mean of its divisors is an integer number (56805453456).

Almost surely, 2^220121132111 is an apocalyptic number.

220121132111 is a deficient number, since it is larger than the sum of its proper divisors (7100681713).

220121132111 is an equidigital number, since it uses as much as digits as its factorization.

220121132111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100681712.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 220121132111 its reverse (111231121022), we get a palindrome (331352253133).

It can be divided in two parts, 2201211 and 32111, that added together give a palindrome (2233322).

The spelling of 220121132111 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred thirty-two thousand, one hundred eleven".