22121210407 has 4 divisors (see below), whose sum is σ = 23422458096. Its totient is φ = 20819962720.

The previous prime is 22121210383. The next prime is 22121210429. The reversal of 22121210407 is 70401212122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121210407 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 (22121210467) 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, 650623819 + ... + 650623852.

It is an arithmetic number, because the mean of its divisors is an integer number (5855614524).

Almost surely, 2^22121210407 is an apocalyptic number.

22121210407 is a deficient number, since it is larger than the sum of its proper divisors (1301247689).

22121210407 is a wasteful number, since it uses less digits than its factorization.

22121210407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301247688.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 22121210407 its reverse (70401212122), we get a palindrome (92522422529).

The spelling of 22121210407 in words is "twenty-two billion, one hundred twenty-one million, two hundred ten thousand, four hundred seven".