21010212103 has 8 divisors (see below), whose sum is σ = 22118998320. Its totient is φ = 19901724480.

The previous prime is 21010212073. The next prime is 21010212133. The reversal of 21010212103 is 30121201012.

It is an interprime number because it is at equal distance from previous prime (21010212073) and next prime (21010212133).

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 21010212103 - 2¹⁷ = 21010081031 is a prime.

It is a super-2 number, since 2×21010212103² (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 (21010212133) 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, 77793 + ... + 219253.

It is an arithmetic number, because the mean of its divisors is an integer number (2764874790).

Almost surely, 2^21010212103 is an apocalyptic number.

21010212103 is a deficient number, since it is larger than the sum of its proper divisors (1108786217).

21010212103 is a wasteful number, since it uses less digits than its factorization.

21010212103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149297.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21010212103 its reverse (30121201012), we get a palindrome (51131413115).

The spelling of 21010212103 in words is "twenty-one billion, ten million, two hundred twelve thousand, one hundred three".