21012310022 has 32 divisors (see below), whose sum is σ = 35368220160. Its totient is φ = 9280522080.

The previous prime is 21012309991. The next prime is 21012310037. The reversal of 21012310022 is 22001321012.

It is a happy number.

It is a super-3 number, since 3×21012310022³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21012309979 and 21012310006.

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, 70628 + ... + 216824.

It is an arithmetic number, because the mean of its divisors is an integer number (1105256880).

Almost surely, 2^21012310022 is an apocalyptic number.

21012310022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012310022 is a deficient number, since it is larger than the sum of its proper divisors (14355910138).

21012310022 is a wasteful number, since it uses less digits than its factorization.

21012310022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146396.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21012310022 its reverse (22001321012), we get a palindrome (43013631034).

The spelling of 21012310022 in words is "twenty-one billion, twelve million, three hundred ten thousand, twenty-two".