10011211220 has 48 divisors (see below), whose sum is σ = 21760598160. Its totient is φ = 3864247296.

The previous prime is 10011211193. The next prime is 10011211241. The reversal of 10011211220 is 2211211001.

It can be written as a sum of positive squares in 8 ways, for example, as 395055376 + 9616155844 = 19876^2 + 98062^2 .

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1384334 + ... + 1391546.

It is an arithmetic number, because the mean of its divisors is an integer number (453345795).

Almost surely, 2^10011211220 is an apocalyptic number.

10011211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10011211220 is an abundant number, since it is smaller than the sum of its proper divisors (11749386940).

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

10011211220 is a wasteful number, since it uses less digits than its factorization.

10011211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9644 (or 9642 counting only the distinct ones).

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

Adding to 10011211220 its reverse (2211211001), we get a palindrome (12222422221).

The spelling of 10011211220 in words is "ten billion, eleven million, two hundred eleven thousand, two hundred twenty".