1001000020120 has 32 divisors (see below), whose sum is σ = 2254255711920. Its totient is φ = 400043445120.

The previous prime is 1001000020109. The next prime is 1001000020121. The reversal of 1001000020120 is 210200001001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001000020121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11097111 + ... + 11186950.

Almost surely, 2^{1001000020120} is an apocalyptic number.

1001000020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001000020120 is an abundant number, since it is smaller than the sum of its proper divisors (1253255691800).

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

1001000020120 is a wasteful number, since it uses less digits than its factorization.

1001000020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22285195 (or 22285191 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 1001000020120 its reverse (210200001001), we get a palindrome (1211200021121).

The spelling of 1001000020120 in words is "one trillion, one billion, twenty thousand, one hundred twenty".