102001212123 has 8 divisors (see below), whose sum is σ = 136006594368. Its totient is φ = 67998318984.

The previous prime is 102001212121. The next prime is 102001212139. The reversal of 102001212123 is 321212100201.

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

It is not a de Polignac number, because 102001212123 - 2¹ = 102001212121 is a prime.

It is a super-2 number, since 2×102001212123² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102001212121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524461 + ... + 692142.

It is an arithmetic number, because the mean of its divisors is an integer number (17000824296).

Almost surely, 2^102001212123 is an apocalyptic number.

102001212123 is a deficient number, since it is larger than the sum of its proper divisors (34005382245).

102001212123 is a wasteful number, since it uses less digits than its factorization.

102001212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244553.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 102001212123 its reverse (321212100201), we get a palindrome (423213312324).

The spelling of 102001212123 in words is "one hundred two billion, one million, two hundred twelve thousand, one hundred twenty-three".