21210102122 has 32 divisors (see below), whose sum is σ = 36764907264. Its totient is φ = 9069926400.

The previous prime is 21210102113. The next prime is 21210102167. The reversal of 21210102122 is 22120101212.

It is a junction number, because it is equal to n+sod(n) for n = 21210102097 and 21210102106.

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, 958847 + ... + 980717.

It is an arithmetic number, because the mean of its divisors is an integer number (1148903352).

Almost surely, 2^21210102122 is an apocalyptic number.

21210102122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210102122 is a deficient number, since it is larger than the sum of its proper divisors (15554805142).

21210102122 is a wasteful number, since it uses less digits than its factorization.

21210102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24494.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210102122 its reverse (22120101212), we get a palindrome (43330203334).

The spelling of 21210102122 in words is "twenty-one billion, two hundred ten million, one hundred two thousand, one hundred twenty-two".