21212021021110 has 32 divisors (see below), whose sum is σ = 38647509912000. Its totient is φ = 8381664009600.

The previous prime is 21212021021101. The next prime is 21212021021201. The reversal of 21212021021110 is 1112012021212.

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, 23476885 + ... + 24363664.

It is an arithmetic number, because the mean of its divisors is an integer number (1207734684750).

Almost surely, 2^{21212021021110} is an apocalyptic number.

21212021021110 is a deficient number, since it is larger than the sum of its proper divisors (17435488890890).

21212021021110 is a wasteful number, since it uses less digits than its factorization.

21212021021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47841096.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21212021021110 its reverse (1112012021212), we get a palindrome (22324033042322).

The spelling of 21212021021110 in words is "twenty-one trillion, two hundred twelve billion, twenty-one million, twenty-one thousand, one hundred ten".