21212001202022 has 32 divisors (see below), whose sum is σ = 32913157814784. Its totient is φ = 10247160924000.

The previous prime is 21212001202009. The next prime is 21212001202031. The reversal of 21212001202022 is 22020210021212.

It is a happy number.

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, 20888147 + ... + 21880097.

It is an arithmetic number, because the mean of its divisors is an integer number (1028536181712).

Almost surely, 2^{21212001202022} is an apocalyptic number.

21212001202022 is a deficient number, since it is larger than the sum of its proper divisors (11701156612762).

21212001202022 is a wasteful number, since it uses less digits than its factorization.

21212001202022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995084.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21212001202022 its reverse (22020210021212), we get a palindrome (43232211223234).

The spelling of 21212001202022 in words is "twenty-one trillion, two hundred twelve billion, one million, two hundred two thousand, twenty-two".