101986111945 has 8 divisors (see below), whose sum is σ = 125368293960. Its totient is φ = 79598916480.

The previous prime is 101986111943. The next prime is 101986111993. The reversal of 101986111945 is 549111689101.

It can be written as a sum of positive squares in 4 ways, for example, as 3093473161 + 98892638784 = 55619^2 + 314472^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101986111945 - 2¹ = 101986111943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101986111895 and 101986111904.

It is not an unprimeable number, because it can be changed into a prime (101986111943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248746410 + ... + 248746819.

It is an arithmetic number, because the mean of its divisors is an integer number (15671036745).

Almost surely, 2^101986111945 is an apocalyptic number.

It is an amenable number.

101986111945 is a deficient number, since it is larger than the sum of its proper divisors (23382182015).

101986111945 is an equidigital number, since it uses as much as digits as its factorization.

101986111945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497493275.

The product of its (nonzero) digits is 77760, while the sum is 46.

The spelling of 101986111945 in words is "one hundred one billion, nine hundred eighty-six million, one hundred eleven thousand, nine hundred forty-five".