20001220121122 has 16 divisors (see below), whose sum is σ = 31767904715040. Its totient is φ = 9411965252928.

The previous prime is 20001220121089. The next prime is 20001220121147. The reversal of 20001220121122 is 22112102210002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20001220121096 and 20001220121105.

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, 10805808 + ... + 12520699.

It is an arithmetic number, because the mean of its divisors is an integer number (1985494044690).

Almost surely, 2^{20001220121122} is an apocalyptic number.

20001220121122 is a deficient number, since it is larger than the sum of its proper divisors (11766684593918).

20001220121122 is a wasteful number, since it uses less digits than its factorization.

20001220121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23351745.

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

Adding to 20001220121122 its reverse (22112102210002), we get a palindrome (42113322331124).

The spelling of 20001220121122 in words is "twenty trillion, one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred twenty-two".