20001212201122 has 4 divisors (see below), whose sum is σ = 30001818301686. Its totient is φ = 10000606100560.

The previous prime is 20001212201093. The next prime is 20001212201141. The reversal of 20001212201122 is 22110221210002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10399586575921 + 9601625625201 = 3224839^2 + 3098649^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20001212201096 and 20001212201105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000303050279 + ... + 5000303050282.

Almost surely, 2^{20001212201122} is an apocalyptic number.

20001212201122 is a deficient number, since it is larger than the sum of its proper divisors (10000606100564).

20001212201122 is a wasteful number, since it uses less digits than its factorization.

20001212201122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000606100563.

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

Adding to 20001212201122 its reverse (22110221210002), we get a palindrome (42111433411124).

The spelling of 20001212201122 in words is "twenty trillion, one billion, two hundred twelve million, two hundred one thousand, one hundred twenty-two".