210021101010203 has 4 divisors (see below), whose sum is σ = 240024115440240. Its totient is φ = 180018086580168.

The previous prime is 210021101010187. The next prime is 210021101010211. The reversal of 210021101010203 is 302010101120012.

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 210021101010203 - 2⁴ = 210021101010187 is a prime.

It is a super-2 number, since 2×210021101010203² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021101013203) 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, 15001507215008 + ... + 15001507215021.

It is an arithmetic number, because the mean of its divisors is an integer number (60006028860060).

Almost surely, 2^{210021101010203} is an apocalyptic number.

210021101010203 is a deficient number, since it is larger than the sum of its proper divisors (30003014430037).

210021101010203 is an equidigital number, since it uses as much as digits as its factorization.

210021101010203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30003014430036.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 210021101010203 its reverse (302010101120012), we get a palindrome (512031202130215).

The spelling of 210021101010203 in words is "two hundred ten trillion, twenty-one billion, one hundred one million, ten thousand, two hundred three".