220000001211121 has 4 divisors (see below), whose sum is σ = 220066087126500. Its totient is φ = 219933915295744.

The previous prime is 220000001211079. The next prime is 220000001211223. The reversal of 220000001211121 is 121112100000022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143749644910096 + 76250356301025 = 11989564^2 + 8732145^2 .

It is a cyclic number.

It is not a de Polignac number, because 220000001211121 - 2¹³ = 220000001202929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220000001211421) 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, 33042952696 + ... + 33042959353.

It is an arithmetic number, because the mean of its divisors is an integer number (55016521781625).

Almost surely, 2^{220000001211121} is an apocalyptic number.

It is an amenable number.

220000001211121 is a deficient number, since it is larger than the sum of its proper divisors (66085915379).

220000001211121 is an equidigital number, since it uses as much as digits as its factorization.

220000001211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66085915378.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 220000001211121 its reverse (121112100000022), we get a palindrome (341112101211143).

The spelling of 220000001211121 in words is "two hundred twenty trillion, one million, two hundred eleven thousand, one hundred twenty-one".