1200122200221 has 32 divisors (see below), whose sum is σ = 1832861749248. Its totient is φ = 684246087360.

The previous prime is 1200122200181. The next prime is 1200122200223. The reversal of 1200122200221 is 1220022210021.

It is not a de Polignac number, because 1200122200221 - 2¹³ = 1200122192029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200122200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200122200223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30734716 + ... + 30773738.

It is an arithmetic number, because the mean of its divisors is an integer number (57276929664).

Almost surely, 2^{1200122200221} is an apocalyptic number.

It is an amenable number.

1200122200221 is a deficient number, since it is larger than the sum of its proper divisors (632739549027).

1200122200221 is a wasteful number, since it uses less digits than its factorization.

1200122200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42281.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1200122200221 its reverse (1220022210021), we get a palindrome (2420144410242).

The spelling of 1200122200221 in words is "one trillion, two hundred billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-one".