1000101020 has 48 divisors (see below), whose sum is σ = 2120017536. Its totient is φ = 396288000.

The previous prime is 1000100999. The next prime is 1000101079. The reversal of 1000101020 is 201010001.

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 = 1000100995 and 1000101013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1559900 + ... + 1560540.

It is an arithmetic number, because the mean of its divisors is an integer number (44167032).

Almost surely, 2^1000101020 is an apocalyptic number.

1000101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000101020 is an abundant number, since it is smaller than the sum of its proper divisors (1119916516).

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

1000101020 is a wasteful number, since it uses less digits than its factorization.

1000101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 1260 counting only the distinct ones).

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

The square root of 1000101020 is about 31624.3738277930. The cubic root of 1000101020 is about 1000.0336721995.

Adding to 1000101020 its reverse (201010001), we get a palindrome (1201111021).

The spelling of 1000101020 in words is "one billion, one hundred one thousand, twenty".