21110002210 has 64 divisors (see below), whose sum is σ = 42191549568. Its totient is φ = 7539840000.

The previous prime is 21110002181. The next prime is 21110002211. The reversal of 21110002210 is 1220001112.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21110002211) 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, 5909725 + ... + 5913295.

It is an arithmetic number, because the mean of its divisors is an integer number (659242962).

Almost surely, 2^21110002210 is an apocalyptic number.

21110002210 is a deficient number, since it is larger than the sum of its proper divisors (21081547358).

21110002210 is a wasteful number, since it uses less digits than its factorization.

21110002210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4531.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21110002210 its reverse (1220001112), we get a palindrome (22330003322).

The spelling of 21110002210 in words is "twenty-one billion, one hundred ten million, two thousand, two hundred ten".