1200201120021 has 16 divisors (see below), whose sum is σ = 1635677445888. Its totient is φ = 782457792000.

The previous prime is 1200201120007. The next prime is 1200201120043. The reversal of 1200201120021 is 1200211020021.

It is not a de Polignac number, because 1200201120021 - 2⁵ = 1200201119989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200201119979 and 1200201120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200201120071) 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, 3374400 + ... + 3713081.

It is an arithmetic number, because the mean of its divisors is an integer number (102229840368).

Almost surely, 2^{1200201120021} is an apocalyptic number.

It is an amenable number.

1200201120021 is a deficient number, since it is larger than the sum of its proper divisors (435476325867).

1200201120021 is a wasteful number, since it uses less digits than its factorization.

1200201120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7088732.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200201120021 its reverse (1200211020021), we get a palindrome (2400412140042).

The spelling of 1200201120021 in words is "one trillion, two hundred billion, two hundred one million, one hundred twenty thousand, twenty-one".