105148972821 has 8 divisors (see below), whose sum is σ = 145033066080. Its totient is φ = 67682097392.

The previous prime is 105148972727. The next prime is 105148972823. The reversal of 105148972821 is 128279841501.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 105148972821 - 2⁹ = 105148972309 is a prime.

It is a super-2 number, since 2×105148972821² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105148972823) 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, 604304355 + ... + 604304528.

It is an arithmetic number, because the mean of its divisors is an integer number (18129133260).

Almost surely, 2^105148972821 is an apocalyptic number.

It is an amenable number.

105148972821 is a deficient number, since it is larger than the sum of its proper divisors (39884093259).

105148972821 is a wasteful number, since it uses less digits than its factorization.

105148972821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208608915.

The product of its (nonzero) digits is 322560, while the sum is 48.

The spelling of 105148972821 in words is "one hundred five billion, one hundred forty-eight million, nine hundred seventy-two thousand, eight hundred twenty-one".