210103213021 has 16 divisors (see below), whose sum is σ = 227705524480. Its totient is φ = 192707242560.

The previous prime is 210103212961. The next prime is 210103213081. The reversal of 210103213021 is 120312301012.

It is an interprime number because it is at equal distance from previous prime (210103212961) and next prime (210103213081).

It is a cyclic number.

It is not a de Polignac number, because 210103213021 - 2²³ = 210094824413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210103212986 and 210103213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210103213081) 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, 12364351 + ... + 12381331.

It is an arithmetic number, because the mean of its divisors is an integer number (14231595280).

Almost surely, 2^210103213021 is an apocalyptic number.

It is an amenable number.

210103213021 is a deficient number, since it is larger than the sum of its proper divisors (17602311459).

210103213021 is a wasteful number, since it uses less digits than its factorization.

210103213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22996.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 210103213021 its reverse (120312301012), we get a palindrome (330415514033).

The spelling of 210103213021 in words is "two hundred ten billion, one hundred three million, two hundred thirteen thousand, twenty-one".