21122000002 has 16 divisors (see below), whose sum is σ = 32002593912. Its totient is φ = 10454698240.

The previous prime is 21121999993. The next prime is 21122000017. The reversal of 21122000002 is 20000022112.

It can be written as a sum of positive squares in 4 ways, for example, as 6105703321 + 15016296681 = 78139^2 + 122541^2 .

It is a super-2 number, since 2×21122000002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128628 + ... + 242464.

Almost surely, 2^21122000002 is an apocalyptic number.

21122000002 is a deficient number, since it is larger than the sum of its proper divisors (10880593910).

21122000002 is a wasteful number, since it uses less digits than its factorization.

21122000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114773.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21122000002 its reverse (20000022112), we get a palindrome (41122022114).

It can be divided in two parts, 2112 and 2000002, that multiplied together give a palindrome (4224004224).

The spelling of 21122000002 in words is "twenty-one billion, one hundred twenty-two million, two", and thus it is an aban number.