2001111002120 has 16 divisors (see below), whose sum is σ = 4502499754860. Its totient is φ = 800444400832.

The previous prime is 2001111002021. The next prime is 2001111002173. The reversal of 2001111002120 is 212001111002.

It can be written as a sum of positive squares in 2 ways, for example, as 1603966524484 + 397144477636 = 1266478^2 + 630194^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25013887487 + ... + 25013887566.

Almost surely, 2^{2001111002120} is an apocalyptic number.

2001111002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001111002120 is an abundant number, since it is smaller than the sum of its proper divisors (2501388752740).

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

2001111002120 is a wasteful number, since it uses less digits than its factorization.

2001111002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50027775064 (or 50027775060 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2001111002120 its reverse (212001111002), we get a palindrome (2213112113122).

The spelling of 2001111002120 in words is "two trillion, one billion, one hundred eleven million, two thousand, one hundred twenty".