21103102103210 has 8 divisors (see below), whose sum is σ = 37985583785796. Its totient is φ = 8441240841280.

The previous prime is 21103102103203. The next prime is 21103102103219. The reversal of 21103102103210 is 1230120130112.

It can be written as a sum of positive squares in 2 ways, for example, as 19222586303449 + 1880515799761 = 4384357^2 + 1371319^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21103102103219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055155105151 + ... + 1055155105170.

Almost surely, 2^{21103102103210} is an apocalyptic number.

21103102103210 is a deficient number, since it is larger than the sum of its proper divisors (16882481682586).

21103102103210 is a wasteful number, since it uses less digits than its factorization.

21103102103210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110310210328.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21103102103210 its reverse (1230120130112), we get a palindrome (22333222233322).

The spelling of 21103102103210 in words is "twenty-one trillion, one hundred three billion, one hundred two million, one hundred three thousand, two hundred ten".