1020122221220 has 12 divisors (see below), whose sum is σ = 2142256664604. Its totient is φ = 408048888480.

The previous prime is 1020122221213. The next prime is 1020122221231. The reversal of 1020122221220 is 221222210201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 806508171364 + 213614049856 = 898058^2 + 462184^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25503055511 + ... + 25503055550.

It is an arithmetic number, because the mean of its divisors is an integer number (178521388717).

Almost surely, 2^{1020122221220} is an apocalyptic number.

1020122221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020122221220 is an abundant number, since it is smaller than the sum of its proper divisors (1122134443384).

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

1020122221220 is a wasteful number, since it uses less digits than its factorization.

1020122221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51006111070 (or 51006111068 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1020122221220 its reverse (221222210201), we get a palindrome (1241344431421).

It can be divided in two parts, 102012 and 2221220, that added together give a palindrome (2323232).

The spelling of 1020122221220 in words is "one trillion, twenty billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".