131223101040421 has 16 divisors (see below), whose sum is σ = 141434858139904. Its totient is φ = 121028159064384.

The previous prime is 131223101040391. The next prime is 131223101040431. The reversal of 131223101040421 is 124040101322131.

It is not a de Polignac number, because 131223101040421 - 2⁷ = 131223101040293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223101040431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 941360290 + ... + 941499676.

It is an arithmetic number, because the mean of its divisors is an integer number (8839678633744).

Almost surely, 2^{131223101040421} is an apocalyptic number.

It is an amenable number.

131223101040421 is a deficient number, since it is larger than the sum of its proper divisors (10211757099483).

131223101040421 is a wasteful number, since it uses less digits than its factorization.

131223101040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199180.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 131223101040421 its reverse (124040101322131), we get a palindrome (255263202362552).

The spelling of 131223101040421 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, one hundred one million, forty thousand, four hundred twenty-one".