21030101312 has 56 divisors (see below), whose sum is σ = 45550421472. Its totient is φ = 9553881600.

The previous prime is 21030101291. The next prime is 21030101317. The reversal of 21030101312 is 21310103012.

It is a super-2 number, since 2×21030101312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030101317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1459262 + ... + 1473602.

Almost surely, 2^21030101312 is an apocalyptic number.

21030101312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21030101312 is an abundant number, since it is smaller than the sum of its proper divisors (24520320160).

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

21030101312 is a wasteful number, since it uses less digits than its factorization.

21030101312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16447 (or 16437 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21030101312 its reverse (21310103012), we get a palindrome (42340204324).

The spelling of 21030101312 in words is "twenty-one billion, thirty million, one hundred one thousand, three hundred twelve".