21031321094 has 16 divisors (see below), whose sum is σ = 36295668000. Its totient is φ = 8952929664.

The previous prime is 21031321093. The next prime is 21031321127. The reversal of 21031321094 is 49012313012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031321093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5038979 + ... + 5043150.

It is an arithmetic number, because the mean of its divisors is an integer number (2268479250).

Almost surely, 2^21031321094 is an apocalyptic number.

21031321094 is a deficient number, since it is larger than the sum of its proper divisors (15264346906).

21031321094 is a wasteful number, since it uses less digits than its factorization.

21031321094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10082287.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 21031321094 in words is "twenty-one billion, thirty-one million, three hundred twenty-one thousand, ninety-four".