21310121214 has 192 divisors, whose sum is σ = 53241027840. Its totient is φ = 6123479040.

The previous prime is 21310121167. The next prime is 21310121219. The reversal of 21310121214 is 41212101312.

21310121214 is a `hidden beast` number, since 21 + 310 + 121 + 214 = 666.

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 (21310121219) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13461067 + ... + 13462649.

It is an arithmetic number, because the mean of its divisors is an integer number (277297020).

Almost surely, 2^21310121214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21310121214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26620513920).

21310121214 is an abundant number, since it is smaller than the sum of its proper divisors (31930906626).

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

21310121214 is a wasteful number, since it uses less digits than its factorization.

21310121214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715 (or 1712 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21310121214 its reverse (41212101312), we get a palindrome (62522222526).

The spelling of 21310121214 in words is "twenty-one billion, three hundred ten million, one hundred twenty-one thousand, two hundred fourteen".