21121033302 has 12 divisors (see below), whose sum is σ = 45762238860. Its totient is φ = 7040344428.

The previous prime is 21121033253. The next prime is 21121033319. The reversal of 21121033302 is 20333012112.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1173390739 = 21121033302 / (2 + 1 + 1 + 2 + 1 + 0 + 3 + 3 + 3 + 0 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586695352 + ... + 586695387.

It is an arithmetic number, because the mean of its divisors is an integer number (3813519905).

Almost surely, 2^21121033302 is an apocalyptic number.

21121033302 is an abundant number, since it is smaller than the sum of its proper divisors (24641205558).

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

21121033302 is a wasteful number, since it uses less digits than its factorization.

21121033302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173390747 (or 1173390744 counting only the distinct ones).

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

Adding to 21121033302 its reverse (20333012112), we get a palindrome (41454045414).

The spelling of 21121033302 in words is "twenty-one billion, one hundred twenty-one million, thirty-three thousand, three hundred two".