21261603614103 has 24 divisors (see below), whose sum is σ = 30871698734448. Its totient is φ = 14100349923072.

The previous prime is 21261603614101. The next prime is 21261603614137. The reversal of 21261603614103 is 30141630616212.

21261603614103 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 1 + 603 + 6 + 1 + 41 + 0 + 3 = 666.

It is not a de Polignac number, because 21261603614103 - 2¹ = 21261603614101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21261603614101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11054700 + ... + 12834702.

It is an arithmetic number, because the mean of its divisors is an integer number (1286320780602).

Almost surely, 2^{21261603614103} is an apocalyptic number.

21261603614103 is a deficient number, since it is larger than the sum of its proper divisors (9610095120345).

21261603614103 is a wasteful number, since it uses less digits than its factorization.

21261603614103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786943 (or 1786940 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 21261603614103 in words is "twenty-one trillion, two hundred sixty-one billion, six hundred three million, six hundred fourteen thousand, one hundred three".