131421211224 has 32 divisors (see below), whose sum is σ = 328572162240. Its totient is φ = 43804519200.

The previous prime is 131421211223. The next prime is 131421211291. The reversal of 131421211224 is 422112124131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 131421211194 and 131421211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131421211223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286719 + ... + 587409.

It is an arithmetic number, because the mean of its divisors is an integer number (10267880070).

Almost surely, 2^131421211224 is an apocalyptic number.

It is an amenable number.

131421211224 is an abundant number, since it is smaller than the sum of its proper divisors (197150951016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131421211224 is a wasteful number, since it uses less digits than its factorization.

131421211224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318911 (or 318907 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

Adding to 131421211224 its reverse (422112124131), we get a palindrome (553533335355).

The spelling of 131421211224 in words is "one hundred thirty-one billion, four hundred twenty-one million, two hundred eleven thousand, two hundred twenty-four".