21210102020122 has 8 divisors (see below), whose sum is σ = 31815888413472. Its totient is φ = 10604805882300.

The previous prime is 21210102020083. The next prime is 21210102020167. The reversal of 21210102020122 is 22102020101212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21210102020096 and 21210102020105.

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, 122455704 + ... + 122628787.

It is an arithmetic number, because the mean of its divisors is an integer number (3976986051684).

Almost surely, 2^{21210102020122} is an apocalyptic number.

21210102020122 is a deficient number, since it is larger than the sum of its proper divisors (10605786393350).

21210102020122 is a wasteful number, since it uses less digits than its factorization.

21210102020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245127764.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21210102020122 its reverse (22102020101212), we get a palindrome (43312122121334).

The spelling of 21210102020122 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, twenty thousand, one hundred twenty-two".