1320020421100 has 36 divisors (see below), whose sum is σ = 2866829624008. Its totient is φ = 527568480000.

The previous prime is 1320020421091. The next prime is 1320020421101. The reversal of 1320020421100 is 11240200231.

It is not an unprimeable number, because it can be changed into a prime (1320020421101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5375406 + ... + 5615605.

Almost surely, 2^{1320020421100} is an apocalyptic number.

1320020421100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320020421100 is an abundant number, since it is smaller than the sum of its proper divisors (1546809202908).

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

1320020421100 is a wasteful number, since it uses less digits than its factorization.

1320020421100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10992226 (or 10992219 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1320020421100 its reverse (11240200231), we get a palindrome (1331260621331).

The spelling of 1320020421100 in words is "one trillion, three hundred twenty billion, twenty million, four hundred twenty-one thousand, one hundred".