1100021323220 has 24 divisors (see below), whose sum is σ = 2445929766504. Its totient is φ = 414125674496.

The previous prime is 1100021323189. The next prime is 1100021323231. The reversal of 1100021323220 is 223231200011.

It can be written as a sum of positive squares in 4 ways, for example, as 457606249156 + 642415074064 = 676466^2 + 801508^2 .

It is a super-2 number, since 2×1100021323220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

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, 1617678077 + ... + 1617678756.

It is an arithmetic number, because the mean of its divisors is an integer number (101913740271).

Almost surely, 2^{1100021323220} is an apocalyptic number.

1100021323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100021323220 is an abundant number, since it is smaller than the sum of its proper divisors (1345908443284).

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

1100021323220 is a wasteful number, since it uses less digits than its factorization.

1100021323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235356859 (or 3235356857 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1100021323220 its reverse (223231200011), we get a palindrome (1323252523231).

It can be divided in two parts, 1100021 and 323220, that added together give a palindrome (1423241).

The spelling of 1100021323220 in words is "one trillion, one hundred billion, twenty-one million, three hundred twenty-three thousand, two hundred twenty".