21222211302 has 64 divisors (see below), whose sum is σ = 47680512000. Its totient is φ = 6996417120.

The previous prime is 21222211277. The next prime is 21222211321. The reversal of 21222211302 is 20311222212.

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 31 ways as a sum of consecutive naturals, for example, 2265324 + ... + 2274672.

It is an arithmetic number, because the mean of its divisors is an integer number (745008000).

Almost surely, 2^21222211302 is an apocalyptic number.

21222211302 is an abundant number, since it is smaller than the sum of its proper divisors (26458300698).

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

21222211302 is a wasteful number, since it uses less digits than its factorization.

21222211302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9818 (or 9812 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21222211302 its reverse (20311222212), we get a palindrome (41533433514).

The spelling of 21222211302 in words is "twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, three hundred two".