1100021123820 has 48 divisors (see below), whose sum is σ = 3080297592288. Its totient is φ = 293316257280.

The previous prime is 1100021123777. The next prime is 1100021123821. The reversal of 1100021123820 is 283211200011.

It is not an unprimeable number, because it can be changed into a prime (1100021123821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79080 + ... + 1485360.

It is an arithmetic number, because the mean of its divisors is an integer number (64172866506).

Almost surely, 2^{1100021123820} is an apocalyptic number.

1100021123820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100021123820 is an abundant number, since it is smaller than the sum of its proper divisors (1980276468468).

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

1100021123820 is a wasteful number, since it uses less digits than its factorization.

1100021123820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419330 (or 1419328 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 1100021123820 its reverse (283211200011), we get a palindrome (1383232323831).

The spelling of 1100021123820 in words is "one trillion, one hundred billion, twenty-one million, one hundred twenty-three thousand, eight hundred twenty".