1200112120021 has 6 divisors (see below), whose sum is σ = 1254559551350. Its totient is φ = 1147933331688.

The previous prime is 1200112120019. The next prime is 1200112120033. The reversal of 1200112120021 is 1200212110021.

It can be written as a sum of positive squares in only one way, i.e., 1060302684100 + 139809435921 = 1029710^2 + 373911^2 .

It is not a de Polignac number, because 1200112120021 - 2¹ = 1200112120019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200112119983 and 1200112120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200112120001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1134320946 + ... + 1134322003.

Almost surely, 2^{1200112120021} is an apocalyptic number.

It is an amenable number.

1200112120021 is a deficient number, since it is larger than the sum of its proper divisors (54447431329).

1200112120021 is an equidigital number, since it uses as much as digits as its factorization.

1200112120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268642995 (or 2268642972 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200112120021 its reverse (1200212110021), we get a palindrome (2400324230042).

The spelling of 1200112120021 in words is "one trillion, two hundred billion, one hundred twelve million, one hundred twenty thousand, twenty-one".