2220221122121 has 4 divisors (see below), whose sum is σ = 2220245091792. Its totient is φ = 2220197152452.

The previous prime is 2220221122081. The next prime is 2220221122129. The reversal of 2220221122121 is 1212211220222.

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-2220221122121 is a prime.

It is a super-2 number, since 2×2220221122121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2220221122093 and 2220221122102.

It is not an unprimeable number, because it can be changed into a prime (2220221122129) 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, 11845355 + ... + 12031328.

It is an arithmetic number, because the mean of its divisors is an integer number (555061272948).

Almost surely, 2^{2220221122121} is an apocalyptic number.

It is an amenable number.

2220221122121 is a deficient number, since it is larger than the sum of its proper divisors (23969671).

2220221122121 is an equidigital number, since it uses as much as digits as its factorization.

2220221122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23969670.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2220221122121 its reverse (1212211220222), we get a palindrome (3432432342343).

The spelling of 2220221122121 in words is "two trillion, two hundred twenty billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".