101011220 has 24 divisors (see below), whose sum is σ = 223288800. Its totient is φ = 38277792.

The previous prime is 101011189. The next prime is 101011259. The reversal of 101011220 is 22110101.

It is a junction number, because it is equal to n+sod(n) for n = 101011198 and 101011207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132530 + ... + 133289.

It is an arithmetic number, because the mean of its divisors is an integer number (9303700).

Almost surely, 2^101011220 is an apocalyptic number.

101011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101011220 is an abundant number, since it is smaller than the sum of its proper divisors (122277580).

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

101011220 is a wasteful number, since it uses less digits than its factorization.

101011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265847 (or 265845 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 101011220 is about 10050.4338214825. The cubic root of 101011220 is about 465.7181949097.

Adding to 101011220 its reverse (22110101), we get a palindrome (123121321).

The spelling of 101011220 in words is "one hundred one million, eleven thousand, two hundred twenty".