220120112012221 has 4 divisors (see below), whose sum is σ = 220151981153632. Its totient is φ = 220088242870812.

The previous prime is 220120112012219. The next prime is 220120112012267. The reversal of 220120112012221 is 122210211021022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220120112012221 - 2¹ = 220120112012219 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 (220120112012821) 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, 15934560345 + ... + 15934574158.

It is an arithmetic number, because the mean of its divisors is an integer number (55037995288408).

Almost surely, 2^{220120112012221} is an apocalyptic number.

It is an amenable number.

220120112012221 is a deficient number, since it is larger than the sum of its proper divisors (31869141411).

220120112012221 is an equidigital number, since it uses as much as digits as its factorization.

220120112012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31869141410.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220120112012221 its reverse (122210211021022), we get a palindrome (342330323033243).

The spelling of 220120112012221 in words is "two hundred twenty trillion, one hundred twenty billion, one hundred twelve million, twelve thousand, two hundred twenty-one".