21110101111210 has 8 divisors (see below), whose sum is σ = 37998182000196. Its totient is φ = 8444040444480.

The previous prime is 21110101111201. The next prime is 21110101111247. The reversal of 21110101111210 is 1211110101112.

It can be written as a sum of positive squares in 2 ways, for example, as 19971272779929 + 1138828331281 = 4468923^2 + 1067159^2 .

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

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, 1055505055551 + ... + 1055505055570.

Almost surely, 2^{21110101111210} is an apocalyptic number.

21110101111210 is a deficient number, since it is larger than the sum of its proper divisors (16888080888986).

21110101111210 is a wasteful number, since it uses less digits than its factorization.

21110101111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111010111128.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 21110101111210 its reverse (1211110101112), we get a palindrome (22321211212322).

The spelling of 21110101111210 in words is "twenty-one trillion, one hundred ten billion, one hundred one million, one hundred eleven thousand, two hundred ten".