121211112331 has 4 divisors (see below), whose sum is σ = 121214815200. Its totient is φ = 121207409464.

The previous prime is 121211112287. The next prime is 121211112353. The reversal of 121211112331 is 133211112121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121211112331 - 2⁷ = 121211112203 is a prime.

It is a super-2 number, since 2×121211112331² (a number of 23 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 = 121211112299 and 121211112308.

It is not an unprimeable number, because it can be changed into a prime (121211112371) 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, 1801891 + ... + 1867948.

It is an arithmetic number, because the mean of its divisors is an integer number (30303703800).

Almost surely, 2^121211112331 is an apocalyptic number.

121211112331 is a deficient number, since it is larger than the sum of its proper divisors (3702869).

121211112331 is an equidigital number, since it uses as much as digits as its factorization.

121211112331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702868.

The product of its digits is 72, while the sum is 19.

Adding to 121211112331 its reverse (133211112121), we get a palindrome (254422224452).

The spelling of 121211112331 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, three hundred thirty-one".