10020111021220 has 24 divisors (see below), whose sum is σ = 21044006815104. Its totient is φ = 4007706566496.

The previous prime is 10020111021209. The next prime is 10020111021223. The reversal of 10020111021220 is 2212011102001.

It is a super-2 number, since 2×10020111021220² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10020111021220.

It is not an unprimeable number, because it can be changed into a prime (10020111021223) 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, 20871852 + ... + 21346531.

It is an arithmetic number, because the mean of its divisors is an integer number (876833617296).

Almost surely, 2^{10020111021220} is an apocalyptic number.

10020111021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10020111021220 is an abundant number, since it is smaller than the sum of its proper divisors (11023895793884).

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

10020111021220 is a wasteful number, since it uses less digits than its factorization.

10020111021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42230259 (or 42230257 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10020111021220 its reverse (2212011102001), we get a palindrome (12232122123221).

The spelling of 10020111021220 in words is "ten trillion, twenty billion, one hundred eleven million, twenty-one thousand, two hundred twenty".