20122002011 has 4 divisors (see below), whose sum is σ = 20122963392. Its totient is φ = 20121040632.

The previous prime is 20122001989. The next prime is 20122002013. The reversal of 20122002011 is 11020022102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11020022102 = 2 ⋅5510011051.

It is a cyclic number.

It is not a de Polignac number, because 20122002011 - 2³⁴ = 2942132827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122001983 and 20122002001.

It is not an unprimeable number, because it can be changed into a prime (20122002013) 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, 448580 + ... + 491393.

It is an arithmetic number, because the mean of its divisors is an integer number (5030740848).

Almost surely, 2^20122002011 is an apocalyptic number.

20122002011 is a deficient number, since it is larger than the sum of its proper divisors (961381).

20122002011 is an equidigital number, since it uses as much as digits as its factorization.

20122002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961380.

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

Adding to 20122002011 its reverse (11020022102), we get a palindrome (31142024113).

The spelling of 20122002011 in words is "twenty billion, one hundred twenty-two million, two thousand, eleven".