981521350103 has 16 divisors (see below), whose sum is σ = 1131039168000. Its totient is φ = 834341837472.

The previous prime is 981521350099. The next prime is 981521350169. The reversal of 981521350103 is 301053125189.

It is a cyclic number.

It is not a de Polignac number, because 981521350103 - 2² = 981521350099 is a prime.

It is a super-2 number, since 2×981521350103² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981521350193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345353 + ... + 1443021.

It is an arithmetic number, because the mean of its divisors is an integer number (70689948000).

Almost surely, 2^981521350103 is an apocalyptic number.

981521350103 is a deficient number, since it is larger than the sum of its proper divisors (149517817897).

981521350103 is a wasteful number, since it uses less digits than its factorization.

981521350103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098734.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 981521350103 in words is "nine hundred eighty-one billion, five hundred twenty-one million, three hundred fifty thousand, one hundred three".