2011012120121 has 4 divisors (see below), whose sum is σ = 2011018272000. Its totient is φ = 2011005968244.

The previous prime is 2011012120069. The next prime is 2011012120123. The reversal of 2011012120121 is 1210212101102.

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 not a de Polignac number, because 2011012120121 - 2¹⁰ = 2011012119097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011012120096 and 2011012120105.

It is not an unprimeable number, because it can be changed into a prime (2011012120123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2556341 + ... + 3249138.

It is an arithmetic number, because the mean of its divisors is an integer number (502754568000).

Almost surely, 2^{2011012120121} is an apocalyptic number.

It is an amenable number.

2011012120121 is a deficient number, since it is larger than the sum of its proper divisors (6151879).

2011012120121 is an equidigital number, since it uses as much as digits as its factorization.

2011012120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6151878.

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

Adding to 2011012120121 its reverse (1210212101102), we get a palindrome (3221224221223).

The spelling of 2011012120121 in words is "two trillion, eleven billion, twelve million, one hundred twenty thousand, one hundred twenty-one".