21031331122 has 8 divisors (see below), whose sum is σ = 31707134316. Its totient is φ = 10462286352.

The previous prime is 21031331107. The next prime is 21031331131. The reversal of 21031331122 is 22113313012.

It can be written as a sum of positive squares in 2 ways, for example, as 21027610081 + 3721041 = 145009^2 + 1929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21031331122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26689113 + ... + 26689900.

Almost surely, 2^21031331122 is an apocalyptic number.

21031331122 is a deficient number, since it is larger than the sum of its proper divisors (10675803194).

21031331122 is a wasteful number, since it uses less digits than its factorization.

21031331122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53379212.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21031331122 its reverse (22113313012), we get a palindrome (43144644134).

The spelling of 21031331122 in words is "twenty-one billion, thirty-one million, three hundred thirty-one thousand, one hundred twenty-two".