21121233214 has 8 divisors (see below), whose sum is σ = 31694286600. Its totient is φ = 10556471016.

The previous prime is 21121233197. The next prime is 21121233233. The reversal of 21121233214 is 41233212112.

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

It is a super-2 number, since 2×21121233214² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2066424 + ... + 2076619.

It is an arithmetic number, because the mean of its divisors is an integer number (3961785825).

Almost surely, 2^21121233214 is an apocalyptic number.

21121233214 is a deficient number, since it is larger than the sum of its proper divisors (10573053386).

21121233214 is a wasteful number, since it uses less digits than its factorization.

21121233214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145594.

The product of its digits is 576, while the sum is 22.

Adding to 21121233214 its reverse (41233212112), we get a palindrome (62354445326).

The spelling of 21121233214 in words is "twenty-one billion, one hundred twenty-one million, two hundred thirty-three thousand, two hundred fourteen".