103966612821 has 12 divisors (see below), whose sum is σ = 151861345740. Its totient is φ = 68532298560.

The previous prime is 103966612807. The next prime is 103966612831. The reversal of 103966612821 is 128216669301.

It can be written as a sum of positive squares in 2 ways, for example, as 52514763921 + 51451848900 = 229161^2 + 226830^2 .

It is not a de Polignac number, because 103966612821 - 2¹⁰ = 103966611797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103966612831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64897210 + ... + 64898811.

It is an arithmetic number, because the mean of its divisors is an integer number (12655112145).

Almost surely, 2^103966612821 is an apocalyptic number.

It is an amenable number.

103966612821 is a deficient number, since it is larger than the sum of its proper divisors (47894732919).

103966612821 is a wasteful number, since it uses less digits than its factorization.

103966612821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129796116 (or 129796113 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 103966612821 in words is "one hundred three billion, nine hundred sixty-six million, six hundred twelve thousand, eight hundred twenty-one".