21121222010110 has 64 divisors (see below), whose sum is σ = 40396851593280. Its totient is φ = 7928636866560.

The previous prime is 21121222010087. The next prime is 21121222010113. The reversal of 21121222010110 is 1101022212112.

It is a super-2 number, since 2×21121222010110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121222010113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7643352 + ... + 10033108.

It is an arithmetic number, because the mean of its divisors is an integer number (631200806145).

Almost surely, 2^{21121222010110} is an apocalyptic number.

21121222010110 is a deficient number, since it is larger than the sum of its proper divisors (19275629583170).

21121222010110 is a wasteful number, since it uses less digits than its factorization.

21121222010110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390221.

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

Adding to 21121222010110 its reverse (1101022212112), we get a palindrome (22222244222222).

The spelling of 21121222010110 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, ten thousand, one hundred ten".