1020110221220 has 12 divisors (see below), whose sum is σ = 2142231464604. Its totient is φ = 408044088480.

The previous prime is 1020110221211. The next prime is 1020110221259. The reversal of 1020110221220 is 221220110201.

It can be written as a sum of positive squares in 2 ways, for example, as 393470161984 + 626640059236 = 627272^2 + 791606^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1020110221195 and 1020110221204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25502755511 + ... + 25502755550.

It is an arithmetic number, because the mean of its divisors is an integer number (178519288717).

Almost surely, 2^{1020110221220} is an apocalyptic number.

1020110221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020110221220 is an abundant number, since it is smaller than the sum of its proper divisors (1122121243384).

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

1020110221220 is a wasteful number, since it uses less digits than its factorization.

1020110221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51005511070 (or 51005511068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1020110221220 its reverse (221220110201), we get a palindrome (1241330331421).

The spelling of 1020110221220 in words is "one trillion, twenty billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty".