121011431 has 4 divisors (see below), whose sum is σ = 122371200. Its totient is φ = 119651664.

The previous prime is 121011413. The next prime is 121011463. The reversal of 121011431 is 134110121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121011431 is a prime.

It is a super-2 number, since 2×121011431² = 29287532865335522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001431) 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, 679751 + ... + 679928.

It is an arithmetic number, because the mean of its divisors is an integer number (30592800).

Almost surely, 2^121011431 is an apocalyptic number.

121011431 is a deficient number, since it is larger than the sum of its proper divisors (1359769).

121011431 is an equidigital number, since it uses as much as digits as its factorization.

121011431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359768.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 121011431 is about 11000.5195786381. The cubic root of 121011431 is about 494.6243192409.

Adding to 121011431 its reverse (134110121), we get a palindrome (255121552).

The spelling of 121011431 in words is "one hundred twenty-one million, eleven thousand, four hundred thirty-one".