131421020221 has 8 divisors (see below), whose sum is σ = 133658141760. Its totient is φ = 129184220352.

The previous prime is 131421020201. The next prime is 131421020323. The reversal of 131421020221 is 122020124131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131421020221 - 2¹³ = 131421012029 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 (131421020201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830736 + ... + 976198.

It is an arithmetic number, because the mean of its divisors is an integer number (16707267720).

Almost surely, 2^131421020221 is an apocalyptic number.

It is an amenable number.

131421020221 is a deficient number, since it is larger than the sum of its proper divisors (2237121539).

131421020221 is a wasteful number, since it uses less digits than its factorization.

131421020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160835.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 131421020221 its reverse (122020124131), we get a palindrome (253441144352).

The spelling of 131421020221 in words is "one hundred thirty-one billion, four hundred twenty-one million, twenty thousand, two hundred twenty-one".