31421204133 has 12 divisors (see below), whose sum is σ = 46049809344. Its totient is φ = 19043153800.

The previous prime is 31421204123. The next prime is 31421204147. The reversal of 31421204133 is 33140212413.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-31421204133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421204123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43279533 + ... + 43280258.

It is an arithmetic number, because the mean of its divisors is an integer number (3837484112).

Almost surely, 2^31421204133 is an apocalyptic number.

31421204133 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31421204133 is a deficient number, since it is larger than the sum of its proper divisors (14628605211).

31421204133 is a wasteful number, since it uses less digits than its factorization.

31421204133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86559816 (or 86559805 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31421204133 its reverse (33140212413), we get a palindrome (64561416546).

The spelling of 31421204133 in words is "thirty-one billion, four hundred twenty-one million, two hundred four thousand, one hundred thirty-three".