21120002021122 has 16 divisors (see below), whose sum is σ = 33543655068672. Its totient is φ = 9938788200000.

The previous prime is 21120002021101. The next prime is 21120002021219. The reversal of 21120002021122 is 22112020002112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21120002021096 and 21120002021105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9863143 + ... + 11811925.

It is an arithmetic number, because the mean of its divisors is an integer number (2096478441792).

Almost surely, 2^{21120002021122} is an apocalyptic number.

21120002021122 is a deficient number, since it is larger than the sum of its proper divisors (12423653047550).

21120002021122 is a wasteful number, since it uses less digits than its factorization.

21120002021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267553.

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

Adding to 21120002021122 its reverse (22112020002112), we get a palindrome (43232022023234).

The spelling of 21120002021122 in words is "twenty-one trillion, one hundred twenty billion, two million, twenty-one thousand, one hundred twenty-two".