21210121002022 has 16 divisors (see below), whose sum is σ = 32871138094080. Its totient is φ = 10257863889672.

The previous prime is 21210121001963. The next prime is 21210121002043. The reversal of 21210121002022 is 22020012101212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21210121001987 and 21210121002005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1197220822 + ... + 1197238537.

It is an arithmetic number, because the mean of its divisors is an integer number (2054446130880).

Almost surely, 2^{21210121002022} is an apocalyptic number.

21210121002022 is a deficient number, since it is larger than the sum of its proper divisors (11661017092058).

21210121002022 is a wasteful number, since it uses less digits than its factorization.

21210121002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394459507.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21210121002022 its reverse (22020012101212), we get a palindrome (43230133103234).

The spelling of 21210121002022 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-one million, two thousand, twenty-two".