421204531031 has 2 divisors, whose sum is σ = 421204531032. Its totient is φ = 421204531030.

The previous prime is 421204531021. The next prime is 421204531039. The reversal of 421204531031 is 130135402124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421204531031 is a prime.

It is a super-2 number, since 2×421204531031² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421204531039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210602265515 + 210602265516.

It is an arithmetic number, because the mean of its divisors is an integer number (210602265516).

Almost surely, 2^421204531031 is an apocalyptic number.

421204531031 is a deficient number, since it is larger than the sum of its proper divisors (1).

421204531031 is an equidigital number, since it uses as much as digits as its factorization.

421204531031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 421204531031 its reverse (130135402124), we get a palindrome (551339933155).

The spelling of 421204531031 in words is "four hundred twenty-one billion, two hundred four million, five hundred thirty-one thousand, thirty-one".