2011121120231 has 2 divisors, whose sum is σ = 2011121120232. Its totient is φ = 2011121120230.

The previous prime is 2011121120221. The next prime is 2011121120233. The reversal of 2011121120231 is 1320211211102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011121120231 - 2⁶ = 2011121120167 is a prime.

It is a super-2 number, since 2×2011121120231² (a number of 25 digits) contains 22 as substring.

Together with 2011121120233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011121120233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005560560115 + 1005560560116.

It is an arithmetic number, because the mean of its divisors is an integer number (1005560560116).

Almost surely, 2^{2011121120231} is an apocalyptic number.

2011121120231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011121120231 is an equidigital number, since it uses as much as digits as its factorization.

2011121120231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2011121120231 its reverse (1320211211102), we get a palindrome (3331332331333).

The spelling of 2011121120231 in words is "two trillion, eleven billion, one hundred twenty-one million, one hundred twenty thousand, two hundred thirty-one".