31221030030 has 16 divisors (see below), whose sum is σ = 74930472144. Its totient is φ = 8325608000.

The previous prime is 31221030023. The next prime is 31221030073. The reversal of 31221030030 is 3003012213.

It is a super-3 number, since 3×31221030030³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31221029991 and 31221030009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520350471 + ... + 520350530.

It is an arithmetic number, because the mean of its divisors is an integer number (4683154509).

Almost surely, 2^31221030030 is an apocalyptic number.

31221030030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31221030030 is an abundant number, since it is smaller than the sum of its proper divisors (43709442114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31221030030 is a wasteful number, since it uses less digits than its factorization.

31221030030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040701011.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31221030030 its reverse (3003012213), we get a palindrome (34224042243).

The spelling of 31221030030 in words is "thirty-one billion, two hundred twenty-one million, thirty thousand, thirty".