21022002270 has 48 divisors (see below), whose sum is σ = 56541944160. Its totient is φ = 5412560832.

The previous prime is 21022002181. The next prime is 21022002271. The reversal of 21022002270 is 7220022012.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022002271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4024594 + ... + 4029813.

It is an arithmetic number, because the mean of its divisors is an integer number (1177957170).

Almost surely, 2^21022002270 is an apocalyptic number.

21022002270 is an abundant number, since it is smaller than the sum of its proper divisors (35519941890).

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

21022002270 is a wasteful number, since it uses less digits than its factorization.

21022002270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8054449 (or 8054446 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

Adding to 21022002270 its reverse (7220022012), we get a palindrome (28242024282).

The spelling of 21022002270 in words is "twenty-one billion, twenty-two million, two thousand, two hundred seventy".