20002122011 has 4 divisors (see below), whose sum is σ = 20045511024. Its totient is φ = 19958733000.

The previous prime is 20002121999. The next prime is 20002122053. The reversal of 20002122011 is 11022120002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002122011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002121983 and 20002122001.

It is not an unprimeable number, because it can be changed into a prime (20002122061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21693815 + ... + 21694736.

It is an arithmetic number, because the mean of its divisors is an integer number (5011377756).

Almost surely, 2^20002122011 is an apocalyptic number.

20002122011 is a deficient number, since it is larger than the sum of its proper divisors (43389013).

20002122011 is an equidigital number, since it uses as much as digits as its factorization.

20002122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43389012.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20002122011 its reverse (11022120002), we get a palindrome (31024242013).

The spelling of 20002122011 in words is "twenty billion, two million, one hundred twenty-two thousand, eleven".