1031120221000 has 64 divisors (see below), whose sum is σ = 2412983430000. Its totient is φ = 412420377600.

The previous prime is 1031120220983. The next prime is 1031120221013. The reversal of 1031120221000 is 1220211301.

It can be written as a sum of positive squares in 8 ways, for example, as 1816634884 + 1029303586116 = 42622^2 + 1014546^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21625186 + ... + 21672814.

Almost surely, 2^{1031120221000} is an apocalyptic number.

1031120221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031120221000 is an abundant number, since it is smaller than the sum of its proper divisors (1381863209000).

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

1031120221000 is a wasteful number, since it uses less digits than its factorization.

1031120221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69299 (or 69285 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1031120221000 its reverse (1220211301), we get a palindrome (1032340432301).

The spelling of 1031120221000 in words is "one trillion, thirty-one billion, one hundred twenty million, two hundred twenty-one thousand".