21210010323031 has 8 divisors (see below), whose sum is σ = 21508858053504. Its totient is φ = 20911165792440.

The previous prime is 21210010323011. The next prime is 21210010323091. The reversal of 21210010323031 is 13032301001212.

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 21210010323031 - 2⁵ = 21210010322999 is a prime.

It is a super-2 number, since 2×21210010323031² (a number of 27 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 (21210010323011) 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, 14632840 + ... + 16016866.

It is an arithmetic number, because the mean of its divisors is an integer number (2688607256688).

Almost surely, 2^{21210010323031} is an apocalyptic number.

21210010323031 is a deficient number, since it is larger than the sum of its proper divisors (298847730473).

21210010323031 is a wasteful number, since it uses less digits than its factorization.

21210010323031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599941.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21210010323031 its reverse (13032301001212), we get a palindrome (34242311324243).

The spelling of 21210010323031 in words is "twenty-one trillion, two hundred ten billion, ten million, three hundred twenty-three thousand, thirty-one".