20120401331 has 2 divisors, whose sum is σ = 20120401332. Its totient is φ = 20120401330.

The previous prime is 20120401321. The next prime is 20120401351. The reversal of 20120401331 is 13310402102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120401331 is a prime.

It is a super-2 number, since 2×20120401331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20120401321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060200665 + 10060200666.

It is an arithmetic number, because the mean of its divisors is an integer number (10060200666).

Almost surely, 2^20120401331 is an apocalyptic number.

20120401331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120401331 is an equidigital number, since it uses as much as digits as its factorization.

20120401331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20120401331 its reverse (13310402102), we get a palindrome (33430803433).

The spelling of 20120401331 in words is "twenty billion, one hundred twenty million, four hundred one thousand, three hundred thirty-one".