131421220401 has 4 divisors (see below), whose sum is σ = 175228293872. Its totient is φ = 87614146932.

The previous prime is 131421220373. The next prime is 131421220423. The reversal of 131421220401 is 104022124131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104022124131 = 3 ⋅34674041377.

It is not a de Polignac number, because 131421220401 - 2¹⁴ = 131421204017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131421220481) 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, 21903536731 + ... + 21903536736.

It is an arithmetic number, because the mean of its divisors is an integer number (43807073468).

Almost surely, 2^131421220401 is an apocalyptic number.

It is an amenable number.

131421220401 is a deficient number, since it is larger than the sum of its proper divisors (43807073471).

131421220401 is an equidigital number, since it uses as much as digits as its factorization.

131421220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43807073470.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 131421220401 its reverse (104022124131), we get a palindrome (235443344532).

The spelling of 131421220401 in words is "one hundred thirty-one billion, four hundred twenty-one million, two hundred twenty thousand, four hundred one".