20122020001 has 4 divisors (see below), whose sum is σ = 20172200004. Its totient is φ = 20071840000.

The previous prime is 20122019999. The next prime is 20122020013. The reversal of 20122020001 is 10002022102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10002022102 = 2 ⋅5001011051.

It can be written as a sum of positive squares in 2 ways, for example, as 14250629376 + 5871390625 = 119376^2 + 76625^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122020001 - 2¹ = 20122019999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122020001.

It is not an unprimeable number, because it can be changed into a prime (20122020031) 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, 25089400 + ... + 25090201.

It is an arithmetic number, because the mean of its divisors is an integer number (5043050001).

Almost surely, 2^20122020001 is an apocalyptic number.

It is an amenable number.

20122020001 is a deficient number, since it is larger than the sum of its proper divisors (50180003).

20122020001 is an equidigital number, since it uses as much as digits as its factorization.

20122020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50180002.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20122020001 its reverse (10002022102), we get a palindrome (30124042103).

The spelling of 20122020001 in words is "twenty billion, one hundred twenty-two million, twenty thousand, one".