21122031010 has 8 divisors (see below), whose sum is σ = 38019655836. Its totient is φ = 8448812400.

The previous prime is 21122031001. The next prime is 21122031031. The reversal of 21122031010 is 1013022112.

It can be written as a sum of positive squares in 2 ways, for example, as 20992822321 + 129208689 = 144889^2 + 11367^2 .

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

It is a super-2 number, since 2×21122031010² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056101541 + ... + 1056101560.

Almost surely, 2^21122031010 is an apocalyptic number.

21122031010 is a deficient number, since it is larger than the sum of its proper divisors (16897624826).

21122031010 is a wasteful number, since it uses less digits than its factorization.

21122031010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112203108.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21122031010 its reverse (1013022112), we get a palindrome (22135053122).

The spelling of 21122031010 in words is "twenty-one billion, one hundred twenty-two million, thirty-one thousand, ten".