2122121207 has 4 divisors (see below), whose sum is σ = 2122704840. Its totient is φ = 2121537576.

The previous prime is 2122121189. The next prime is 2122121227. The reversal of 2122121207 is 7021212212.

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

It is a cyclic number.

It is not a de Polignac number, because 2122121207 - 2⁸ = 2122120951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122121227) 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, 286328 + ... + 293645.

It is an arithmetic number, because the mean of its divisors is an integer number (530676210).

Almost surely, 2^2122121207 is an apocalyptic number.

2122121207 is a deficient number, since it is larger than the sum of its proper divisors (583633).

2122121207 is an equidigital number, since it uses as much as digits as its factorization.

2122121207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583632.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 2122121207 is about 46066.4868098274. The cubic root of 2122121207 is about 1285.0599692422.

Adding to 2122121207 its reverse (7021212212), we get a palindrome (9143333419).

The spelling of 2122121207 in words is "two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred seven".