131435402123 has 4 divisors (see below), whose sum is σ = 137149984848. Its totient is φ = 125720819400.

The previous prime is 131435402081. The next prime is 131435402129. The reversal of 131435402123 is 321204534131.

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 131435402123 - 2¹² = 131435398027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131435402129) 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, 2857291328 + ... + 2857291373.

It is an arithmetic number, because the mean of its divisors is an integer number (34287496212).

Almost surely, 2^131435402123 is an apocalyptic number.

131435402123 is a deficient number, since it is larger than the sum of its proper divisors (5714582725).

131435402123 is an equidigital number, since it uses as much as digits as its factorization.

131435402123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5714582724.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 131435402123 its reverse (321204534131), we get a palindrome (452639936254).

The spelling of 131435402123 in words is "one hundred thirty-one billion, four hundred thirty-five million, four hundred two thousand, one hundred twenty-three".