101010221020 has 24 divisors (see below), whose sum is σ = 221344137504. Its totient is φ = 38647388736.

The previous prime is 101010221009. The next prime is 101010221021. The reversal of 101010221020 is 20122010101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 101010220988 and 101010221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101010221021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109793259 + ... + 109794178.

It is an arithmetic number, because the mean of its divisors is an integer number (9222672396).

Almost surely, 2^101010221020 is an apocalyptic number.

101010221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101010221020 is an abundant number, since it is smaller than the sum of its proper divisors (120333916484).

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

101010221020 is a wasteful number, since it uses less digits than its factorization.

101010221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219587469 (or 219587467 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 101010221020 its reverse (20122010101), we get a palindrome (121132231121).

The spelling of 101010221020 in words is "one hundred one billion, ten million, two hundred twenty-one thousand, twenty".