10011021220 has 24 divisors (see below), whose sum is σ = 21025093824. Its totient is φ = 4004037216.

The previous prime is 10011021211. The next prime is 10011021259. The reversal of 10011021220 is 2212011001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10011021197 and 10011021206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326259 + ... + 355621.

It is an arithmetic number, because the mean of its divisors is an integer number (876045576).

Almost surely, 2^10011021220 is an apocalyptic number.

10011021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10011021220 is an abundant number, since it is smaller than the sum of its proper divisors (11014072604).

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

10011021220 is a wasteful number, since it uses less digits than its factorization.

10011021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46419 (or 46417 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10011021220 its reverse (2212011001), we get a palindrome (12223032221).

The spelling of 10011021220 in words is "ten billion, eleven million, twenty-one thousand, two hundred twenty".