21120200012122 has 8 divisors (see below), whose sum is σ = 31734269866656. Its totient is φ = 10542110056572.

The previous prime is 21120200012077. The next prime is 21120200012143. The reversal of 21120200012122 is 22121000202112.

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 = 21120200012096 and 21120200012105.

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, 8994973278 + ... + 8994975625.

It is an arithmetic number, because the mean of its divisors is an integer number (3966783733332).

Almost surely, 2^{21120200012122} is an apocalyptic number.

21120200012122 is a deficient number, since it is larger than the sum of its proper divisors (10614069854534).

21120200012122 is a wasteful number, since it uses less digits than its factorization.

21120200012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17989949492.

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

Adding to 21120200012122 its reverse (22121000202112), we get a palindrome (43241200214234).

The spelling of 21120200012122 in words is "twenty-one trillion, one hundred twenty billion, two hundred million, twelve thousand, one hundred twenty-two".