102011020123 has 4 divisors (see below), whose sum is σ = 102011761080. Its totient is φ = 102010279168.

The previous prime is 102011020091. The next prime is 102011020129. The reversal of 102011020123 is 321020110201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 102011020123 - 2⁵ = 102011020091 is a prime.

It is a super-2 number, since 2×102011020123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102011020129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96358 + ... + 461851.

It is an arithmetic number, because the mean of its divisors is an integer number (25502940270).

Almost surely, 2^102011020123 is an apocalyptic number.

102011020123 is a deficient number, since it is larger than the sum of its proper divisors (740957).

102011020123 is an equidigital number, since it uses as much as digits as its factorization.

102011020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740956.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 102011020123 its reverse (321020110201), we get a palindrome (423031130324).

The spelling of 102011020123 in words is "one hundred two billion, eleven million, twenty thousand, one hundred twenty-three".