21021200020022 has 16 divisors (see below), whose sum is σ = 31563423263232. Its totient is φ = 10500060162600.

The previous prime is 21021200020013. The next prime is 21021200020057. The reversal of 21021200020022 is 22002000212012.

It is a junction number, because it is equal to n+sod(n) for n = 21021200019979 and 21021200020006.

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, 34880147 + ... + 35477697.

It is an arithmetic number, because the mean of its divisors is an integer number (1972713953952).

Almost surely, 2^{21021200020022} is an apocalyptic number.

21021200020022 is a deficient number, since it is larger than the sum of its proper divisors (10542223243210).

21021200020022 is a wasteful number, since it uses less digits than its factorization.

21021200020022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615163.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21021200020022 its reverse (22002000212012), we get a palindrome (43023200232034).

The spelling of 21021200020022 in words is "twenty-one trillion, twenty-one billion, two hundred million, twenty thousand, twenty-two".