21131242214 has 8 divisors (see below), whose sum is σ = 31716891360. Its totient is φ = 10558945096.

The previous prime is 21131242213. The next prime is 21131242247. The reversal of 21131242214 is 41224213112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21131242214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131242213) 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, 3334049 + ... + 3340380.

It is an arithmetic number, because the mean of its divisors is an integer number (3964611420).

Almost surely, 2^21131242214 is an apocalyptic number.

21131242214 is a deficient number, since it is larger than the sum of its proper divisors (10585649146).

21131242214 is a wasteful number, since it uses less digits than its factorization.

21131242214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6676014.

The product of its digits is 768, while the sum is 23.

Adding to 21131242214 its reverse (41224213112), we get a palindrome (62355455326).

The spelling of 21131242214 in words is "twenty-one billion, one hundred thirty-one million, two hundred forty-two thousand, two hundred fourteen".