21301033212 has 24 divisors (see below), whose sum is σ = 55224901200. Its totient is φ = 7100344368.

The previous prime is 21301033189. The next prime is 21301033241. The reversal of 21301033212 is 21233010312.

21301033212 is a `hidden beast` number, since 21 + 301 + 0 + 332 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98615787 + ... + 98616002.

It is an arithmetic number, because the mean of its divisors is an integer number (2301037550).

Almost surely, 2^21301033212 is an apocalyptic number.

It is an amenable number.

21301033212 is an abundant number, since it is smaller than the sum of its proper divisors (33923867988).

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

21301033212 is a wasteful number, since it uses less digits than its factorization.

21301033212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197231802 (or 197231794 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21301033212 its reverse (21233010312), we get a palindrome (42534043524).

The spelling of 21301033212 in words is "twenty-one billion, three hundred one million, thirty-three thousand, two hundred twelve".