210203310312021 has 16 divisors (see below), whose sum is σ = 301911379314944. Its totient is φ = 129321175402944.

The previous prime is 210203310311971. The next prime is 210203310312059. The reversal of 210203310312021 is 120213013302012.

It is not a de Polignac number, because 210203310312021 - 2⁷ = 210203310311893 is a prime.

It is a super-2 number, since 2×210203310312021² (a number of 29 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 (210203310312521) 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, 722933326 + ... + 723224031.

It is an arithmetic number, because the mean of its divisors is an integer number (18869461207184).

Almost surely, 2^{210203310312021} is an apocalyptic number.

It is an amenable number.

210203310312021 is a deficient number, since it is larger than the sum of its proper divisors (91708069002923).

210203310312021 is a wasteful number, since it uses less digits than its factorization.

210203310312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446161100.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 210203310312021 its reverse (120213013302012), we get a palindrome (330416323614033).

The spelling of 210203310312021 in words is "two hundred ten trillion, two hundred three billion, three hundred ten million, three hundred twelve thousand, twenty-one".