20121212214 has 16 divisors (see below), whose sum is σ = 44713805040. Its totient is φ = 6707070720.

The previous prime is 20121212213. The next prime is 20121212219. The reversal of 20121212214 is 41221212102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121212213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186307467 + ... + 186307574.

It is an arithmetic number, because the mean of its divisors is an integer number (2794612815).

Almost surely, 2^20121212214 is an apocalyptic number.

20121212214 is an abundant number, since it is smaller than the sum of its proper divisors (24592592826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121212214 is a wasteful number, since it uses less digits than its factorization.

20121212214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372615052 (or 372615046 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20121212214 its reverse (41221212102), we get a palindrome (61342424316).

The spelling of 20121212214 in words is "twenty billion, one hundred twenty-one million, two hundred twelve thousand, two hundred fourteen".