21002110122 has 32 divisors (see below), whose sum is σ = 48322750464. Its totient is φ = 5960862000.

The previous prime is 21002110069. The next prime is 21002110139. The reversal of 21002110122 is 22101120012.

It is a super-2 number, since 2×21002110122² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002110098 and 21002110107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1649454 + ... + 1662137.

It is an arithmetic number, because the mean of its divisors is an integer number (1510085952).

Almost surely, 2^21002110122 is an apocalyptic number.

21002110122 is an abundant number, since it is smaller than the sum of its proper divisors (27320640342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002110122 is a wasteful number, since it uses less digits than its factorization.

21002110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311754.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21002110122 its reverse (22101120012), we get a palindrome (43103230134).

The spelling of 21002110122 in words is "twenty-one billion, two million, one hundred ten thousand, one hundred twenty-two".