21110101203 has 32 divisors (see below), whose sum is σ = 30241769472. Its totient is φ = 13051584000.

The previous prime is 21110101153. The next prime is 21110101231. The reversal of 21110101203 is 30210101112.

It is not a de Polignac number, because 21110101203 - 2¹⁷ = 21109970131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110101253) 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, 1077150 + ... + 1096572.

It is an arithmetic number, because the mean of its divisors is an integer number (945055296).

Almost surely, 2^21110101203 is an apocalyptic number.

21110101203 is a deficient number, since it is larger than the sum of its proper divisors (9131668269).

21110101203 is a wasteful number, since it uses less digits than its factorization.

21110101203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19755.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21110101203 its reverse (30210101112), we get a palindrome (51320202315).

Subtracting 21110101203 from its reverse (30210101112), we obtain a palindrome (9099999909).

The spelling of 21110101203 in words is "twenty-one billion, one hundred ten million, one hundred one thousand, two hundred three".