331220040221421 has 48 divisors (see below), whose sum is σ = 515806526669616. Its totient is φ = 203600143853568.

The previous prime is 331220040221269. The next prime is 331220040221429. The reversal of 331220040221421 is 124122040022133.

331220040221421 is a `hidden beast` number, since 3 + 3 + 1 + 2 + 20 + 0 + 402 + 214 + 21 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 10367041204521 + 320852999016900 = 3219789^2 + 17912370^2 .

It is not a de Polignac number, because 331220040221421 - 2²² = 331220036027117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331220040221429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1281617611 + ... + 1281876023.

It is an arithmetic number, because the mean of its divisors is an integer number (10745969305617).

Almost surely, 2^{331220040221421} is an apocalyptic number.

It is an amenable number.

331220040221421 is a deficient number, since it is larger than the sum of its proper divisors (184586486448195).

331220040221421 is a wasteful number, since it uses less digits than its factorization.

331220040221421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270622 (or 270619 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 331220040221421 its reverse (124122040022133), we get a palindrome (455342080243554).

The spelling of 331220040221421 in words is "three hundred thirty-one trillion, two hundred twenty billion, forty million, two hundred twenty-one thousand, four hundred twenty-one".