2201100100121 has 4 divisors (see below), whose sum is σ = 2370415492452. Its totient is φ = 2031784707792.

The previous prime is 2201100100117. The next prime is 2201100100153. The reversal of 2201100100121 is 1210010011022.

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 1205964170896 + 995135929225 = 1098164^2 + 997565^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201100100121 - 2² = 2201100100117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2201100100421) 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, 84657696146 + ... + 84657696171.

It is an arithmetic number, because the mean of its divisors is an integer number (592603873113).

Almost surely, 2^{2201100100121} is an apocalyptic number.

It is an amenable number.

2201100100121 is a deficient number, since it is larger than the sum of its proper divisors (169315392331).

2201100100121 is a wasteful number, since it uses less digits than its factorization.

2201100100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169315392330.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2201100100121 its reverse (1210010011022), we get a palindrome (3411110111143).

The spelling of 2201100100121 in words is "two trillion, two hundred one billion, one hundred million, one hundred thousand, one hundred twenty-one".