21221212002110 has 8 divisors (see below), whose sum is σ = 38198181603816. Its totient is φ = 8488484800840.

The previous prime is 21221212002097. The next prime is 21221212002143. The reversal of 21221212002110 is 1120021212212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061060600096 + ... + 1061060600115.

It is an arithmetic number, because the mean of its divisors is an integer number (4774772700477).

Almost surely, 2^{21221212002110} is an apocalyptic number.

21221212002110 is a deficient number, since it is larger than the sum of its proper divisors (16976969601706).

21221212002110 is a wasteful number, since it uses less digits than its factorization.

21221212002110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122121200218.

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

Adding to 21221212002110 its reverse (1120021212212), we get a palindrome (22341233214322).

The spelling of 21221212002110 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred twelve million, two thousand, one hundred ten".