220220012112121 has 4 divisors (see below), whose sum is σ = 251680013842432. Its totient is φ = 188760010381812.

The previous prime is 220220012112101. The next prime is 220220012112203. The reversal of 220220012112121 is 121211210022022.

220220012112121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220220012112121 - 2²¹ = 220220010014969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220220012112101) 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, 15730000865145 + ... + 15730000865158.

It is an arithmetic number, because the mean of its divisors is an integer number (62920003460608).

Almost surely, 2^{220220012112121} is an apocalyptic number.

It is an amenable number.

220220012112121 is a deficient number, since it is larger than the sum of its proper divisors (31460001730311).

220220012112121 is an equidigital number, since it uses as much as digits as its factorization.

220220012112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31460001730310.

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

Adding to 220220012112121 its reverse (121211210022022), we get a palindrome (341431222134143).

The spelling of 220220012112121 in words is "two hundred twenty trillion, two hundred twenty billion, twelve million, one hundred twelve thousand, one hundred twenty-one".