101011001020 has 24 divisors (see below), whose sum is σ = 212911675200. Its totient is φ = 40254196032.

The previous prime is 101011000999. The next prime is 101011001033. The reversal of 101011001020 is 20100110101.

It is a junction number, because it is equal to n+sod(n) for n = 101011000994 and 101011001012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9382260 + ... + 9393019.

It is an arithmetic number, because the mean of its divisors is an integer number (8871319800).

Almost surely, 2^101011001020 is an apocalyptic number.

101011001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101011001020 is an abundant number, since it is smaller than the sum of its proper divisors (111900674180).

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

101011001020 is a wasteful number, since it uses less digits than its factorization.

101011001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18775557 (or 18775555 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 101011001020 its reverse (20100110101), we get a palindrome (121111111121).

The spelling of 101011001020 in words is "one hundred one billion, eleven million, one thousand, twenty".