131001203421 has 16 divisors (see below), whose sum is σ = 211719117120. Its totient is φ = 79394668560.

The previous prime is 131001203383. The next prime is 131001203429. The reversal of 131001203421 is 124302100131.

131001203421 is a `hidden beast` number, since 1 + 310 + 0 + 12 + 0 + 342 + 1 = 666.

It is not a de Polignac number, because 131001203421 - 2¹³ = 131001195229 is a prime.

It is a super-2 number, since 2×131001203421² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131001203394 and 131001203403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131001203429) 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, 220540450 + ... + 220541043.

It is an arithmetic number, because the mean of its divisors is an integer number (13232444820).

Almost surely, 2^131001203421 is an apocalyptic number.

131001203421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131001203421 is a deficient number, since it is larger than the sum of its proper divisors (80717913699).

131001203421 is a wasteful number, since it uses less digits than its factorization.

131001203421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441081513 (or 441081507 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 131001203421 its reverse (124302100131), we get a palindrome (255303303552).

The spelling of 131001203421 in words is "one hundred thirty-one billion, one million, two hundred three thousand, four hundred twenty-one".