21401002103 has 4 divisors (see below), whose sum is σ = 23047233048. Its totient is φ = 19754771160.

The previous prime is 21401002093. The next prime is 21401002123. The reversal of 21401002103 is 30120010412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21401002103 - 2¹⁴ = 21400985719 is a prime.

It is a super-2 number, since 2×21401002103² (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 (21401002123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823115453 + ... + 823115478.

It is an arithmetic number, because the mean of its divisors is an integer number (5761808262).

Almost surely, 2^21401002103 is an apocalyptic number.

21401002103 is a deficient number, since it is larger than the sum of its proper divisors (1646230945).

21401002103 is a wasteful number, since it uses less digits than its factorization.

21401002103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646230944.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21401002103 its reverse (30120010412), we get a palindrome (51521012515).

The spelling of 21401002103 in words is "twenty-one billion, four hundred one million, two thousand, one hundred three".