21111000122 has 8 divisors (see below), whose sum is σ = 32438853972. Its totient is φ = 10298048800.

The previous prime is 21111000091. The next prime is 21111000137. The reversal of 21111000122 is 22100011112.

It can be written as a sum of positive squares in 2 ways, for example, as 19359661321 + 1751338801 = 139139^2 + 41849^2 .

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

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, 128725529 + ... + 128725692.

Almost surely, 2^21111000122 is an apocalyptic number.

21111000122 is a deficient number, since it is larger than the sum of its proper divisors (11327853850).

21111000122 is a wasteful number, since it uses less digits than its factorization.

21111000122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257451264.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21111000122 its reverse (22100011112), we get a palindrome (43211011234).

The spelling of 21111000122 in words is "twenty-one billion, one hundred eleven million, one hundred twenty-two", and thus it is an aban number.