102031020 has 144 divisors (see below), whose sum is σ = 380976960. Its totient is φ = 21523968.

The previous prime is 102030953. The next prime is 102031037. The reversal of 102031020 is 20130201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 102030993 and 102031011.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13266 + ... + 19494.

Almost surely, 2^102031020 is an apocalyptic number.

102031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102031020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190488480).

102031020 is an abundant number, since it is smaller than the sum of its proper divisors (278945940).

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

102031020 is a wasteful number, since it uses less digits than its factorization.

102031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6264 (or 6259 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 102031020 is about 10101.0405404592. The cubic root of 102031020 is about 467.2802326222.

Adding to 102031020 its reverse (20130201), we get a palindrome (122161221).

The spelling of 102031020 in words is "one hundred two million, thirty-one thousand, twenty".