1201120100020 has 24 divisors (see below), whose sum is σ = 2524197441024. Its totient is φ = 480096567456.

The previous prime is 1201120100009. The next prime is 1201120100071. The reversal of 1201120100020 is 200010211021.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 21939012 + ... + 21993691.

It is an arithmetic number, because the mean of its divisors is an integer number (105174893376).

Almost surely, 2^{1201120100020} is an apocalyptic number.

1201120100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201120100020 is an abundant number, since it is smaller than the sum of its proper divisors (1323077341004).

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

1201120100020 is a wasteful number, since it uses less digits than its factorization.

1201120100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43934079 (or 43934077 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1201120100020 its reverse (200010211021), we get a palindrome (1401130311041).

The spelling of 1201120100020 in words is "one trillion, two hundred one billion, one hundred twenty million, one hundred thousand, twenty".