101001020 has 12 divisors (see below), whose sum is σ = 212102184. Its totient is φ = 40400400.

The previous prime is 101001013. The next prime is 101001037. The reversal of 101001020 is 20100101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 101000995 and 101001013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525006 + ... + 2525045.

It is an arithmetic number, because the mean of its divisors is an integer number (17675182).

Almost surely, 2^101001020 is an apocalyptic number.

101001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101001020 is an abundant number, since it is smaller than the sum of its proper divisors (111101164).

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

101001020 is a wasteful number, since it uses less digits than its factorization.

101001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050060 (or 5050058 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 101001020 is about 10049.9263678895. The cubic root of 101001020 is about 465.7025184813.

Adding to 101001020 its reverse (20100101), we get a palindrome (121101121).

The spelling of 101001020 in words is "one hundred one million, one thousand, twenty".