21011202110 has 8 divisors (see below), whose sum is σ = 37820163816. Its totient is φ = 8404480840.

The previous prime is 21011202109. The next prime is 21011202133. The reversal of 21011202110 is 1120211012.

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

It is a super-2 number, since 2×21011202110² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21011202091 and 21011202100.

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, 1050560096 + ... + 1050560115.

It is an arithmetic number, because the mean of its divisors is an integer number (4727520477).

Almost surely, 2^21011202110 is an apocalyptic number.

21011202110 is a deficient number, since it is larger than the sum of its proper divisors (16808961706).

21011202110 is a wasteful number, since it uses less digits than its factorization.

21011202110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101120218.

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

Adding to 21011202110 its reverse (1120211012), we get a palindrome (22131413122).

The spelling of 21011202110 in words is "twenty-one billion, eleven million, two hundred two thousand, one hundred ten".