21220122122 has 8 divisors (see below), whose sum is σ = 31854319200. Its totient is φ = 10602015724.

The previous prime is 21220122107. The next prime is 21220122137. The reversal of 21220122122 is 22122102212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21220122107) and next prime (21220122137).

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

It is a self number, because there is not a number n which added to its sum of digits gives 21220122122.

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, 4019372 + ... + 4024647.

It is an arithmetic number, because the mean of its divisors is an integer number (3981789900).

Almost surely, 2^21220122122 is an apocalyptic number.

21220122122 is a deficient number, since it is larger than the sum of its proper divisors (10634197078).

21220122122 is a wasteful number, since it uses less digits than its factorization.

21220122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8045340.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21220122122 its reverse (22122102212), we get a palindrome (43342224334).

The spelling of 21220122122 in words is "twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-two".