20121322213 has 8 divisors (see below), whose sum is σ = 22039582680. Its totient is φ = 18284689920.

The previous prime is 20121322211. The next prime is 20121322279. The reversal of 20121322213 is 31222312102.

It can be written as a sum of positive squares in 4 ways, for example, as 6282623169 + 13838699044 = 79263^2 + 117638^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121322213 - 2¹ = 20121322211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121322211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20406528 + ... + 20407513.

It is an arithmetic number, because the mean of its divisors is an integer number (2754947835).

Almost surely, 2^20121322213 is an apocalyptic number.

It is an amenable number.

20121322213 is a deficient number, since it is larger than the sum of its proper divisors (1918260467).

20121322213 is a wasteful number, since it uses less digits than its factorization.

20121322213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40814087.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20121322213 its reverse (31222312102), we get a palindrome (51343634315).

The spelling of 20121322213 in words is "twenty billion, one hundred twenty-one million, three hundred twenty-two thousand, two hundred thirteen".