102123020 has 12 divisors (see below), whose sum is σ = 214458384. Its totient is φ = 40849200.

The previous prime is 102123017. The next prime is 102123023. The reversal of 102123020 is 20321201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (102123017) and next prime (102123023).

It is a super-2 number, since 2×102123020² = 20858222427840800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102122992 and 102123010.

It is not an unprimeable number, because it can be changed into a prime (102123023) 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, 2553056 + ... + 2553095.

It is an arithmetic number, because the mean of its divisors is an integer number (17871532).

Almost surely, 2^102123020 is an apocalyptic number.

102123020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102123020 is an abundant number, since it is smaller than the sum of its proper divisors (112335364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102123020 is a wasteful number, since it uses less digits than its factorization.

102123020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5106160 (or 5106158 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 102123020 is about 10105.5935006312. The cubic root of 102123020 is about 467.4206371997.

Adding to 102123020 its reverse (20321201), we get a palindrome (122444221).

The spelling of 102123020 in words is "one hundred two million, one hundred twenty-three thousand, twenty".