1020221100999 has 48 divisors (see below), whose sum is σ = 1574149824000. Its totient is φ = 634885656768.

The previous prime is 1020221100991. The next prime is 1020221101001. The reversal of 1020221100999 is 9990011220201.

It is not a de Polignac number, because 1020221100999 - 2³ = 1020221100991 is a prime.

It is a super-2 number, since 2×1020221100999² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020221100991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3359449 + ... + 3650525.

It is an arithmetic number, because the mean of its divisors is an integer number (32794788000).

Almost surely, 2^{1020221100999} is an apocalyptic number.

1020221100999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1020221100999 is a deficient number, since it is larger than the sum of its proper divisors (553928723001).

1020221100999 is a wasteful number, since it uses less digits than its factorization.

1020221100999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291404 (or 291401 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

It can be divided in two parts, 102022 and 1100999, that added together give a palindrome (1203021).

The spelling of 1020221100999 in words is "one trillion, twenty billion, two hundred twenty-one million, one hundred thousand, nine hundred ninety-nine".