21020222310 has 32 divisors (see below), whose sum is σ = 53103720960. Its totient is φ = 5310371808.

The previous prime is 21020222303. The next prime is 21020222351. The reversal of 21020222310 is 1322202012.

It is a happy number.

It is a super-3 number, since 3×21020222310³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21020222310.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18438222 + ... + 18439361.

It is an arithmetic number, because the mean of its divisors is an integer number (1659491280).

Almost surely, 2^21020222310 is an apocalyptic number.

21020222310 is an abundant number, since it is smaller than the sum of its proper divisors (32083498650).

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

21020222310 is a wasteful number, since it uses less digits than its factorization.

21020222310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36877612.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21020222310 its reverse (1322202012), we get a palindrome (22342424322).

The spelling of 21020222310 in words is "twenty-one billion, twenty million, two hundred twenty-two thousand, three hundred ten".