21402213112 has 16 divisors (see below), whose sum is σ = 45861885360. Its totient is φ = 9172377024.

The previous prime is 21402213089. The next prime is 21402213113. The reversal of 21402213112 is 21131220412.

It is a self number, because there is not a number n which added to its sum of digits gives 21402213112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402213113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191091133 + ... + 191091244.

It is an arithmetic number, because the mean of its divisors is an integer number (2866367835).

Almost surely, 2^21402213112 is an apocalyptic number.

It is an amenable number.

21402213112 is an abundant number, since it is smaller than the sum of its proper divisors (24459672248).

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

21402213112 is a wasteful number, since it uses less digits than its factorization.

21402213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382182390 (or 382182386 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21402213112 its reverse (21131220412), we get a palindrome (42533433524).

The spelling of 21402213112 in words is "twenty-one billion, four hundred two million, two hundred thirteen thousand, one hundred twelve".