21323212102 has 8 divisors (see below), whose sum is σ = 31988314512. Its totient is φ = 10660440600.

The previous prime is 21323212093. The next prime is 21323212103. The reversal of 21323212102 is 20121232312.

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 21323212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323212103) 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, 559674 + ... + 596557.

It is an arithmetic number, because the mean of its divisors is an integer number (3998539314).

Almost surely, 2^21323212102 is an apocalyptic number.

21323212102 is a deficient number, since it is larger than the sum of its proper divisors (10665102410).

21323212102 is a wasteful number, since it uses less digits than its factorization.

21323212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165454.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21323212102 its reverse (20121232312), we get a palindrome (41444444414).

The spelling of 21323212102 in words is "twenty-one billion, three hundred twenty-three million, two hundred twelve thousand, one hundred two".