131421111 has 4 divisors (see below), whose sum is σ = 175228152. Its totient is φ = 87614072.

The previous prime is 131421109. The next prime is 131421197. The reversal of 131421111 is 111124131.

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 131421111 - 2¹ = 131421109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131421811) 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, 21903516 + ... + 21903521.

It is an arithmetic number, because the mean of its divisors is an integer number (43807038).

Almost surely, 2^131421111 is an apocalyptic number.

131421111 is a deficient number, since it is larger than the sum of its proper divisors (43807041).

131421111 is an equidigital number, since it uses as much as digits as its factorization.

131421111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43807040.

The product of its digits is 24, while the sum is 15.

The square root of 131421111 is about 11463.9047012787. The cubic root of 131421111 is about 508.4189289765.

Adding to 131421111 its reverse (111124131), we get a palindrome (242545242).

The spelling of 131421111 in words is "one hundred thirty-one million, four hundred twenty-one thousand, one hundred eleven".