21030042022 has 16 divisors (see below), whose sum is σ = 34417227600. Its totient is φ = 9557879040.

The previous prime is 21030041999. The next prime is 21030042073. The reversal of 21030042022 is 22024003012.

It is a junction number, because it is equal to n+sod(n) for n = 21030041987 and 21030042005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125854 + ... + 240622.

It is an arithmetic number, because the mean of its divisors is an integer number (2151076725).

Almost surely, 2^21030042022 is an apocalyptic number.

21030042022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21030042022 is a deficient number, since it is larger than the sum of its proper divisors (13387185578).

21030042022 is a wasteful number, since it uses less digits than its factorization.

21030042022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123111.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21030042022 its reverse (22024003012), we get a palindrome (43054045034).

The spelling of 21030042022 in words is "twenty-one billion, thirty million, forty-two thousand, twenty-two".