21010300031 has 8 divisors (see below), whose sum is σ = 24097224864. Its totient is φ = 17944738560.

The previous prime is 21010300027. The next prime is 21010300037. The reversal of 21010300031 is 13000301012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21010300031 - 2² = 21010300027 is a prime.

It is a super-2 number, since 2×21010300031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010299985 and 21010300021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010300037) 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, 5338730 + ... + 5342663.

It is an arithmetic number, because the mean of its divisors is an integer number (3012153108).

Almost surely, 2^21010300031 is an apocalyptic number.

21010300031 is a deficient number, since it is larger than the sum of its proper divisors (3086924833).

21010300031 is a wasteful number, since it uses less digits than its factorization.

21010300031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10681681.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 21010300031 its reverse (13000301012), we get a palindrome (34010601043).

The spelling of 21010300031 in words is "twenty-one billion, ten million, three hundred thousand, thirty-one".