21214212122 has 8 divisors (see below), whose sum is σ = 31822739136. Its totient is φ = 10606632412.

The previous prime is 21214212053. The next prime is 21214212137. The reversal of 21214212122 is 22121241212.

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 = 21214212094 and 21214212103.

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, 177908 + ... + 272175.

It is an arithmetic number, because the mean of its divisors is an integer number (3977842392).

Almost surely, 2^21214212122 is an apocalyptic number.

21214212122 is a deficient number, since it is larger than the sum of its proper divisors (10608527014).

21214212122 is a wasteful number, since it uses less digits than its factorization.

21214212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473652.

The product of its digits is 256, while the sum is 20.

Adding to 21214212122 its reverse (22121241212), we get a palindrome (43335453334).

The spelling of 21214212122 in words is "twenty-one billion, two hundred fourteen million, two hundred twelve thousand, one hundred twenty-two".