2011000122121 has 4 divisors (see below), whose sum is σ = 2011815284752. Its totient is φ = 2010184959492.

The previous prime is 2011000122097. The next prime is 2011000122163. The reversal of 2011000122121 is 1212210001102.

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 2011000122121 - 2⁷ = 2011000121993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011000128121) 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, 407577615 + ... + 407582548.

It is an arithmetic number, because the mean of its divisors is an integer number (502953821188).

Almost surely, 2^{2011000122121} is an apocalyptic number.

It is an amenable number.

2011000122121 is a deficient number, since it is larger than the sum of its proper divisors (815162631).

2011000122121 is an equidigital number, since it uses as much as digits as its factorization.

2011000122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815162630.

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

Adding to 2011000122121 its reverse (1212210001102), we get a palindrome (3223210123223).

The spelling of 2011000122121 in words is "two trillion, eleven billion, one hundred twenty-two thousand, one hundred twenty-one".