21121314103 has 16 divisors (see below), whose sum is σ = 21914514432. Its totient is φ = 20335392000.

The previous prime is 21121314101. The next prime is 21121314121. The reversal of 21121314103 is 30141312112.

It is a cyclic number.

It is not a de Polignac number, because 21121314103 - 2¹ = 21121314101 is a prime.

It is a super-2 number, since 2×21121314103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121314101) 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, 5371048 + ... + 5374978.

It is an arithmetic number, because the mean of its divisors is an integer number (1369657152).

Almost surely, 2^21121314103 is an apocalyptic number.

21121314103 is a deficient number, since it is larger than the sum of its proper divisors (793200329).

21121314103 is a wasteful number, since it uses less digits than its factorization.

21121314103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21121314103 its reverse (30141312112), we get a palindrome (51262626215).

The spelling of 21121314103 in words is "twenty-one billion, one hundred twenty-one million, three hundred fourteen thousand, one hundred three".