101221103020 has 48 divisors (see below), whose sum is σ = 217756189728. Its totient is φ = 39501665280.

The previous prime is 101221103017. The next prime is 101221103023. The reversal of 101221103020 is 20301122101.

It is an interprime number because it is at equal distance from previous prime (101221103017) and next prime (101221103023).

It is not an unprimeable number, because it can be changed into a prime (101221103023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690862 + ... + 824458.

It is an arithmetic number, because the mean of its divisors is an integer number (4536587286).

Almost surely, 2^101221103020 is an apocalyptic number.

101221103020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101221103020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108878094864).

101221103020 is an abundant number, since it is smaller than the sum of its proper divisors (116535086708).

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

101221103020 is a wasteful number, since it uses less digits than its factorization.

101221103020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134530 (or 134528 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 101221103020 its reverse (20301122101), we get a palindrome (121522225121).

The spelling of 101221103020 in words is "one hundred one billion, two hundred twenty-one million, one hundred three thousand, twenty".