102121123 has 12 divisors (see below), whose sum is σ = 110876040. Its totient is φ = 94014336.

The previous prime is 102121109. The next prime is 102121133. The reversal of 102121123 is 321121201.

It is not a de Polignac number, because 102121123 - 2¹⁷ = 101990051 is a prime.

It is a super-2 number, since 2×102121123² = 20857447525562258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99708 + ... + 100726.

It is an arithmetic number, because the mean of its divisors is an integer number (9239670).

Almost surely, 2^102121123 is an apocalyptic number.

102121123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

102121123 is a deficient number, since it is larger than the sum of its proper divisors (8754917).

102121123 is a wasteful number, since it uses less digits than its factorization.

102121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638 (or 1625 counting only the distinct ones).

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

The square root of 102121123 is about 10105.4996412844. The cubic root of 102121123 is about 467.4177429700.

Adding to 102121123 its reverse (321121201), we get a palindrome (423242324).

The spelling of 102121123 in words is "one hundred two million, one hundred twenty-one thousand, one hundred twenty-three".