21212101201022 has 16 divisors (see below), whose sum is σ = 32032910966112. Its totient is φ = 10534560368640.

The previous prime is 21212101201009. The next prime is 21212101201061. The reversal of 21212101201022 is 22010210121212.

It is a super-3 number, since 3×21212101201022³ (a number of 41 digits) contains 333 as substring.

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, 23597123 + ... + 24479550.

It is an arithmetic number, because the mean of its divisors is an integer number (2002056935382).

Almost surely, 2^{21212101201022} is an apocalyptic number.

21212101201022 is a deficient number, since it is larger than the sum of its proper divisors (10820809765090).

21212101201022 is a wasteful number, since it uses less digits than its factorization.

21212101201022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48078163.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21212101201022 its reverse (22010210121212), we get a palindrome (43222311322234).

The spelling of 21212101201022 in words is "twenty-one trillion, two hundred twelve billion, one hundred one million, two hundred one thousand, twenty-two".