101025220 has 24 divisors (see below), whose sum is σ = 224633304. Its totient is φ = 38032896.

The previous prime is 101025179. The next prime is 101025229. The reversal of 101025220 is 22520101.

It can be written as a sum of positive squares in 4 ways, for example, as 29419776 + 71605444 = 5424^2 + 8462^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 101025220.

It is not an unprimeable number, because it can be changed into a prime (101025229) 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, 148227 + ... + 148906.

It is an arithmetic number, because the mean of its divisors is an integer number (9359721).

Almost surely, 2^101025220 is an apocalyptic number.

101025220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101025220 is an abundant number, since it is smaller than the sum of its proper divisors (123608084).

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

101025220 is a wasteful number, since it uses less digits than its factorization.

101025220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297159 (or 297157 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 101025220 is about 10051.1302846993. The cubic root of 101025220 is about 465.7397098580.

Adding to 101025220 its reverse (22520101), we get a palindrome (123545321).

The spelling of 101025220 in words is "one hundred one million, twenty-five thousand, two hundred twenty".