21020211110 has 8 divisors (see below), whose sum is σ = 37836380016. Its totient is φ = 8408084440.

The previous prime is 21020211077. The next prime is 21020211131. The reversal of 21020211110 is 1111202012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21020211091 and 21020211100.

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, 1051010546 + ... + 1051010565.

It is an arithmetic number, because the mean of its divisors is an integer number (4729547502).

Almost surely, 2^21020211110 is an apocalyptic number.

21020211110 is a deficient number, since it is larger than the sum of its proper divisors (16816168906).

21020211110 is a wasteful number, since it uses less digits than its factorization.

21020211110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102021118.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21020211110 its reverse (1111202012), we get a palindrome (22131413122).

The spelling of 21020211110 in words is "twenty-one billion, twenty million, two hundred eleven thousand, one hundred ten".