2000022121 has 4 divisors (see below), whose sum is σ = 2002623700. Its totient is φ = 1997420544.

The previous prime is 2000022119. The next prime is 2000022131. The reversal of 2000022121 is 1212200002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 493728400 + 1506293721 = 22220^2 + 38811^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000022121 - 2¹ = 2000022119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2000022098 and 2000022107.

It is not an unprimeable number, because it can be changed into a prime (2000022131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299636 + ... + 1301173.

It is an arithmetic number, because the mean of its divisors is an integer number (500655925).

Almost surely, 2^2000022121 is an apocalyptic number.

It is an amenable number.

2000022121 is a deficient number, since it is larger than the sum of its proper divisors (2601579).

2000022121 is an equidigital number, since it uses as much as digits as its factorization.

2000022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601578.

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

The square root of 2000022121 is about 44721.6068696106. The cubic root of 2000022121 is about 1259.9256949967.

Adding to 2000022121 its reverse (1212200002), we get a palindrome (3212222123).

The spelling of 2000022121 in words is "two billion, twenty-two thousand, one hundred twenty-one".