2121100022 has 4 divisors (see below), whose sum is σ = 3181650036. Its totient is φ = 1060550010.

The previous prime is 2121100021. The next prime is 2121100097. The reversal of 2121100022 is 2200011212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 2121099976 and 2121100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121100021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530275004 + ... + 530275007.

It is an arithmetic number, because the mean of its divisors is an integer number (795412509).

Almost surely, 2^2121100022 is an apocalyptic number.

2121100022 is a deficient number, since it is larger than the sum of its proper divisors (1060550014).

2121100022 is a wasteful number, since it uses less digits than its factorization.

2121100022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060550013.

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

The square root of 2121100022 is about 46055.4016593059. The cubic root of 2121100022 is about 1284.8538084582.

Adding to 2121100022 its reverse (2200011212), we get a palindrome (4321111234).

The spelling of 2121100022 in words is "two billion, one hundred twenty-one million, one hundred thousand, twenty-two".