2012211100121 has 4 divisors (see below), whose sum is σ = 2013380312244. Its totient is φ = 2011041888000.

The previous prime is 2012211100117. The next prime is 2012211100153. The reversal of 2012211100121 is 1210011122102.

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 882106032025 + 1130105068096 = 939205^2 + 1063064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012211100121 - 2² = 2012211100117 is a prime.

It is a super-2 number, since 2×2012211100121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012211100096 and 2012211100105.

It is not an unprimeable number, because it can be changed into a prime (2012211100021) 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, 584603480 + ... + 584606921.

It is an arithmetic number, because the mean of its divisors is an integer number (503345078061).

Almost surely, 2^{2012211100121} is an apocalyptic number.

It is an amenable number.

2012211100121 is a deficient number, since it is larger than the sum of its proper divisors (1169212123).

2012211100121 is a wasteful number, since it uses less digits than its factorization.

2012211100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169212122.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2012211100121 its reverse (1210011122102), we get a palindrome (3222222222223).

The spelling of 2012211100121 in words is "two trillion, twelve billion, two hundred eleven million, one hundred thousand, one hundred twenty-one".