201110022222121 has 4 divisors (see below), whose sum is σ = 201110343284052. Its totient is φ = 201109701160192.

The previous prime is 201110022222101. The next prime is 201110022222149. The reversal of 201110022222121 is 121222220011102.

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 131490690029721 + 69619332192400 = 11466939^2 + 8343820^2 .

It is a cyclic number.

It is not a de Polignac number, because 201110022222121 - 2⁷ = 201110022221993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201110022222101) 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, 159589540 + ... + 160844773.

It is an arithmetic number, because the mean of its divisors is an integer number (50277585821013).

Almost surely, 2^{201110022222121} is an apocalyptic number.

It is an amenable number.

201110022222121 is a deficient number, since it is larger than the sum of its proper divisors (321061931).

201110022222121 is an equidigital number, since it uses as much as digits as its factorization.

201110022222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321061930.

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

Adding to 201110022222121 its reverse (121222220011102), we get a palindrome (322332242233223).

The spelling of 201110022222121 in words is "two hundred one trillion, one hundred ten billion, twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".