1021112011220 has 48 divisors (see below), whose sum is σ = 2452723435008. Its totient is φ = 349802031360.

The previous prime is 1021112011217. The next prime is 1021112011289. The reversal of 1021112011220 is 221102111201.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1021112011195 and 1021112011204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2889836 + ... + 3223875.

It is an arithmetic number, because the mean of its divisors is an integer number (51098404896).

Almost surely, 2^{1021112011220} is an apocalyptic number.

1021112011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021112011220 is an abundant number, since it is smaller than the sum of its proper divisors (1431611423788).

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

1021112011220 is a wasteful number, since it uses less digits than its factorization.

1021112011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6114920 (or 6114918 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021112011220 its reverse (221102111201), we get a palindrome (1242214122421).

The spelling of 1021112011220 in words is "one trillion, twenty-one billion, one hundred twelve million, eleven thousand, two hundred twenty".