1020311233220 has 24 divisors (see below), whose sum is σ = 2142832042008. Its totient is φ = 408090502400.

The previous prime is 1020311233211. The next prime is 1020311233231. The reversal of 1020311233220 is 223321130201.

It can be written as a sum of positive squares in 4 ways, for example, as 301339515136 + 718971718084 = 548944^2 + 847922^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1020311233192 and 1020311233201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1877591 + ... + 2359230.

It is an arithmetic number, because the mean of its divisors is an integer number (89284668417).

Almost surely, 2^{1020311233220} is an apocalyptic number.

1020311233220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020311233220 is an abundant number, since it is smaller than the sum of its proper divisors (1122520808788).

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

1020311233220 is a wasteful number, since it uses less digits than its factorization.

1020311233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248871 (or 4248869 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1020311233220 its reverse (223321130201), we get a palindrome (1243632363421).

The spelling of 1020311233220 in words is "one trillion, twenty billion, three hundred eleven million, two hundred thirty-three thousand, two hundred twenty".