103021021312 has 128 divisors (see below), whose sum is σ = 233415820800. Its totient is φ = 44866560000.

The previous prime is 103021021289. The next prime is 103021021351. The reversal of 103021021312 is 213120120301.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×103021021312² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4396764 + ... + 4420132.

It is an arithmetic number, because the mean of its divisors is an integer number (1823561100).

Almost surely, 2^103021021312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 103021021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116707910400).

103021021312 is an abundant number, since it is smaller than the sum of its proper divisors (130394799488).

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

103021021312 is a wasteful number, since it uses less digits than its factorization.

103021021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23526 (or 23514 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 103021021312 its reverse (213120120301), we get a palindrome (316141141613).

The spelling of 103021021312 in words is "one hundred three billion, twenty-one million, twenty-one thousand, three hundred twelve".