101022420 has 48 divisors (see below), whose sum is σ = 284921280. Its totient is φ = 26743296.

The previous prime is 101022419. The next prime is 101022443. The reversal of 101022420 is 24220101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 101022396 and 101022405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2284 + ... + 14396.

It is an arithmetic number, because the mean of its divisors is an integer number (5935860).

Almost surely, 2^101022420 is an apocalyptic number.

101022420 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 101022420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142460640).

101022420 is an abundant number, since it is smaller than the sum of its proper divisors (183898860).

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

101022420 is a wasteful number, since it uses less digits than its factorization.

101022420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12264 (or 12262 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 101022420 is about 10050.9909959168. The cubic root of 101022420 is about 465.7354070274.

Adding to 101022420 its reverse (24220101), we get a palindrome (125242521).

The spelling of 101022420 in words is "one hundred one million, twenty-two thousand, four hundred twenty".