21212201302 has 4 divisors (see below), whose sum is σ = 31818301956. Its totient is φ = 10606100650.

The previous prime is 21212201279. The next prime is 21212201321. The reversal of 21212201302 is 20310221212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303050324 + ... + 5303050327.

It is an arithmetic number, because the mean of its divisors is an integer number (7954575489).

Almost surely, 2^21212201302 is an apocalyptic number.

21212201302 is a deficient number, since it is larger than the sum of its proper divisors (10606100654).

21212201302 is a wasteful number, since it uses less digits than its factorization.

21212201302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606100653.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21212201302 its reverse (20310221212), we get a palindrome (41522422514).

The spelling of 21212201302 in words is "twenty-one billion, two hundred twelve million, two hundred one thousand, three hundred two".