21212112302 has 8 divisors (see below), whose sum is σ = 32418511416. Its totient is φ = 10405941832.

The previous prime is 21212112209. The next prime is 21212112401. The reversal of 21212112302 is 20321121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100057028 + ... + 100057239.

It is an arithmetic number, because the mean of its divisors is an integer number (4052313927).

Almost surely, 2^21212112302 is an apocalyptic number.

21212112302 is a deficient number, since it is larger than the sum of its proper divisors (11206399114).

21212112302 is a wasteful number, since it uses less digits than its factorization.

21212112302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200114322.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21212112302 its reverse (20321121212), we get a palindrome (41533233514).

The spelling of 21212112302 in words is "twenty-one billion, two hundred twelve million, one hundred twelve thousand, three hundred two".