1020222021220 has 12 divisors (see below), whose sum is σ = 2142466244604. Its totient is φ = 408088808480.

The previous prime is 1020222021199. The next prime is 1020222021229. The reversal of 1020222021220 is 221202220201.

It can be written as a sum of positive squares in 2 ways, for example, as 196818224164 + 823403797056 = 443642^2 + 907416^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1020222021194 and 1020222021203.

It is not an unprimeable number, because it can be changed into a prime (1020222021229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25505550511 + ... + 25505550550.

It is an arithmetic number, because the mean of its divisors is an integer number (178538853717).

Almost surely, 2^{1020222021220} is an apocalyptic number.

1020222021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020222021220 is an abundant number, since it is smaller than the sum of its proper divisors (1122244223384).

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

1020222021220 is a wasteful number, since it uses less digits than its factorization.

1020222021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51011101070 (or 51011101068 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1020222021220 its reverse (221202220201), we get a palindrome (1241424241421).

The spelling of 1020222021220 in words is "one trillion, twenty billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty".