20020122212011 has 4 divisors (see below), whose sum is σ = 20028303711072. Its totient is φ = 20011940712952.

The previous prime is 20020122211981. The next prime is 20020122212059. The reversal of 20020122212011 is 11021222102002.

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-20020122212011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020128212011) 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, 4090745860 + ... + 4090750753.

It is an arithmetic number, because the mean of its divisors is an integer number (5007075927768).

Almost surely, 2^{20020122212011} is an apocalyptic number.

20020122212011 is a deficient number, since it is larger than the sum of its proper divisors (8181499061).

20020122212011 is an equidigital number, since it uses as much as digits as its factorization.

20020122212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8181499060.

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

Adding to 20020122212011 its reverse (11021222102002), we get a palindrome (31041344314013).

The spelling of 20020122212011 in words is "twenty trillion, twenty billion, one hundred twenty-two million, two hundred twelve thousand, eleven".