20012220122001 has 4 divisors (see below), whose sum is σ = 26682960162672. Its totient is φ = 13341480081332.

The previous prime is 20012220121973. The next prime is 20012220122009. The reversal of 20012220122001 is 10022102221002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20012220122001 - 2¹⁴ = 20012220105617 is a prime.

It is a super-2 number, since 2×20012220122001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20012220122009) 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, 3335370020331 + ... + 3335370020336.

It is an arithmetic number, because the mean of its divisors is an integer number (6670740040668).

Almost surely, 2^{20012220122001} is an apocalyptic number.

It is an amenable number.

20012220122001 is a deficient number, since it is larger than the sum of its proper divisors (6670740040671).

20012220122001 is an equidigital number, since it uses as much as digits as its factorization.

20012220122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670740040670.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20012220122001 its reverse (10022102221002), we get a palindrome (30034322343003).

The spelling of 20012220122001 in words is "twenty trillion, twelve billion, two hundred twenty million, one hundred twenty-two thousand, one".