1200010122221 has 4 divisors (see below), whose sum is σ = 1200071911872. Its totient is φ = 1199948332572.

The previous prime is 1200010122209. The next prime is 1200010122229. The reversal of 1200010122221 is 1222210100021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200010122221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200010122196 and 1200010122205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200010122229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30865685 + ... + 30904538.

It is an arithmetic number, because the mean of its divisors is an integer number (300017977968).

Almost surely, 2^{1200010122221} is an apocalyptic number.

It is an amenable number.

1200010122221 is a deficient number, since it is larger than the sum of its proper divisors (61789651).

1200010122221 is an equidigital number, since it uses as much as digits as its factorization.

1200010122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61789650.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1200010122221 its reverse (1222210100021), we get a palindrome (2422220222242).

It can be divided in two parts, 1200010 and 122221, that added together give a palindrome (1322231).

The spelling of 1200010122221 in words is "one trillion, two hundred billion, ten million, one hundred twenty-two thousand, two hundred twenty-one".