21113003103 has 16 divisors (see below), whose sum is σ = 29816613216. Its totient is φ = 13242920960.

The previous prime is 21113003101. The next prime is 21113003141. The reversal of 21113003103 is 30130031112.

It is a cyclic number.

It is not a de Polignac number, because 21113003103 - 2¹ = 21113003101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113003101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87025 + ... + 223157.

It is an arithmetic number, because the mean of its divisors is an integer number (1863538326).

Almost surely, 2^21113003103 is an apocalyptic number.

21113003103 is a deficient number, since it is larger than the sum of its proper divisors (8703610113).

21113003103 is a wasteful number, since it uses less digits than its factorization.

21113003103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139194.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21113003103 its reverse (30130031112), we get a palindrome (51243034215).

The spelling of 21113003103 in words is "twenty-one billion, one hundred thirteen million, three thousand, one hundred three".