220111210222121 has 4 divisors (see below), whose sum is σ = 220111295745792. Its totient is φ = 220111124698452.

The previous prime is 220111210222031. The next prime is 220111210222151. The reversal of 220111210222121 is 121222012111022.

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 a de Polignac number, because none of the positive numbers 2^k-220111210222121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220111210222093 and 220111210222102.

It is not an unprimeable number, because it can be changed into a prime (220111210222151) 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, 38777561 + ... + 44089926.

It is an arithmetic number, because the mean of its divisors is an integer number (55027823936448).

Almost surely, 2^{220111210222121} is an apocalyptic number.

It is an amenable number.

220111210222121 is a deficient number, since it is larger than the sum of its proper divisors (85523671).

220111210222121 is an equidigital number, since it uses as much as digits as its factorization.

220111210222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85523670.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 220111210222121 its reverse (121222012111022), we get a palindrome (341333222333143).

The spelling of 220111210222121 in words is "two hundred twenty trillion, one hundred eleven billion, two hundred ten million, two hundred twenty-two thousand, one hundred twenty-one".