20121213333 has 16 divisors (see below), whose sum is σ = 29189859776. Its totient is φ = 12254630400.

The previous prime is 20121213323. The next prime is 20121213353. The reversal of 20121213333 is 33331212102.

It is not a de Polignac number, because 20121213333 - 2¹⁶ = 20121147797 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 (20121213323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2655643 + ... + 2663208.

It is an arithmetic number, because the mean of its divisors is an integer number (1824366236).

Almost surely, 2^20121213333 is an apocalyptic number.

It is an amenable number.

20121213333 is a deficient number, since it is larger than the sum of its proper divisors (9068646443).

20121213333 is a wasteful number, since it uses less digits than its factorization.

20121213333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318964.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20121213333 its reverse (33331212102), we get a palindrome (53452425435).

The spelling of 20121213333 in words is "twenty billion, one hundred twenty-one million, two hundred thirteen thousand, three hundred thirty-three".