21214054231 has 8 divisors (see below), whose sum is σ = 22465765584. Its totient is φ = 19962768000.

The previous prime is 21214054193. The next prime is 21214054273. The reversal of 21214054231 is 13245041212.

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 21214054231 - 2¹³ = 21214046039 is a prime.

It is a super-2 number, since 2×21214054231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21214054196 and 21214054205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214054331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520 + ... + 205981.

It is an arithmetic number, because the mean of its divisors is an integer number (2808220698).

Almost surely, 2^21214054231 is an apocalyptic number.

21214054231 is a deficient number, since it is larger than the sum of its proper divisors (1251711353).

21214054231 is a wasteful number, since it uses less digits than its factorization.

21214054231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212561.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21214054231 its reverse (13245041212), we get a palindrome (34459095443).

The spelling of 21214054231 in words is "twenty-one billion, two hundred fourteen million, fifty-four thousand, two hundred thirty-one".