102123021747 has 8 divisors (see below), whose sum is σ = 136219010256. Its totient is φ = 68054523872.

The previous prime is 102123021733. The next prime is 102123021779. The reversal of 102123021747 is 747120321201.

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 102123021747 - 2⁸ = 102123021491 is a prime.

It is a super-2 number, since 2×102123021747² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102123021547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6863988 + ... + 6878849.

It is an arithmetic number, because the mean of its divisors is an integer number (17027376282).

Almost surely, 2^102123021747 is an apocalyptic number.

102123021747 is a deficient number, since it is larger than the sum of its proper divisors (34095988509).

102123021747 is a wasteful number, since it uses less digits than its factorization.

102123021747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13745317.

The product of its (nonzero) digits is 4704, while the sum is 30.

Adding to 102123021747 its reverse (747120321201), we get a palindrome (849243342948).

The spelling of 102123021747 in words is "one hundred two billion, one hundred twenty-three million, twenty-one thousand, seven hundred forty-seven".