103212534253521 has 32 divisors (see below), whose sum is σ = 171575821587456. Its totient is φ = 53616357576000.

The previous prime is 103212534253427. The next prime is 103212534253529. The reversal of 103212534253521 is 125352435212301.

It is not a de Polignac number, because 103212534253521 - 2⁷ = 103212534253393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 103212534253521.

It is not an unprimeable number, because it can be changed into a prime (103212534253529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21101631 + ... + 25528491.

It is an arithmetic number, because the mean of its divisors is an integer number (5361744424608).

Almost surely, 2^{103212534253521} is an apocalyptic number.

103212534253521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103212534253521 is a deficient number, since it is larger than the sum of its proper divisors (68363287333935).

103212534253521 is a wasteful number, since it uses less digits than its factorization.

103212534253521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527813.

The product of its (nonzero) digits is 216000, while the sum is 39.

Adding to 103212534253521 its reverse (125352435212301), we get a palindrome (228564969465822).

The spelling of 103212534253521 in words is "one hundred three trillion, two hundred twelve billion, five hundred thirty-four million, two hundred fifty-three thousand, five hundred twenty-one".