21221365126103 has 8 divisors (see below), whose sum is σ = 22144091690976. Its totient is φ = 20298643437600.

The previous prime is 21221365126099. The next prime is 21221365126187. The reversal of 21221365126103 is 30162156312212.

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

It is a cyclic number.

It is not a de Polignac number, because 21221365126103 - 2² = 21221365126099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221365123103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9788813 + ... + 11758553.

It is an arithmetic number, because the mean of its divisors is an integer number (2768011461372).

Almost surely, 2^{21221365126103} is an apocalyptic number.

21221365126103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21221365126103 is a deficient number, since it is larger than the sum of its proper divisors (922726564873).

21221365126103 is a wasteful number, since it uses less digits than its factorization.

21221365126103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438185.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 21221365126103 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred sixty-five million, one hundred twenty-six thousand, one hundred three".