121001112331 has 4 divisors (see below), whose sum is σ = 132001213464. Its totient is φ = 110001011200.

The previous prime is 121001112329. The next prime is 121001112377. The reversal of 121001112331 is 133211100121.

It is a happy number.

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 121001112331 - 2¹ = 121001112329 is a prime.

It is a super-2 number, since 2×121001112331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001112311) 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, 5500050550 + ... + 5500050571.

It is an arithmetic number, because the mean of its divisors is an integer number (33000303366).

Almost surely, 2^121001112331 is an apocalyptic number.

121001112331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121001112331 is a deficient number, since it is larger than the sum of its proper divisors (11000101133).

121001112331 is a wasteful number, since it uses less digits than its factorization.

121001112331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000101132.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121001112331 its reverse (133211100121), we get a palindrome (254212212452).

It can be divided in two parts, 121001 and 112331, that added together give a palindrome (233332).

The spelling of 121001112331 in words is "one hundred twenty-one billion, one million, one hundred twelve thousand, three hundred thirty-one".