101011221020 has 12 divisors (see below), whose sum is σ = 212123564184. Its totient is φ = 40404488400.

The previous prime is 101011221019. The next prime is 101011221023. The reversal of 101011221020 is 20122110101.

It is a super-3 number, since 3×101011221020³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101011220992 and 101011221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101011221023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525280506 + ... + 2525280545.

It is an arithmetic number, because the mean of its divisors is an integer number (17676963682).

Almost surely, 2^101011221020 is an apocalyptic number.

101011221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101011221020 is an abundant number, since it is smaller than the sum of its proper divisors (111112343164).

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

101011221020 is a wasteful number, since it uses less digits than its factorization.

101011221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050561060 (or 5050561058 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101011221020 its reverse (20122110101), we get a palindrome (121133331121).

The spelling of 101011221020 in words is "one hundred one billion, eleven million, two hundred twenty-one thousand, twenty".