1200221102121 has 8 divisors (see below), whose sum is σ = 1600318770144. Its totient is φ = 800135417760.

The previous prime is 1200221102107. The next prime is 1200221102147. The reversal of 1200221102121 is 1212011220021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1200221102121 - 2⁶ = 1200221102057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200221102121.

It is not an unprimeable number, because it can be changed into a prime (1200221102161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2759556 + ... + 3164741.

It is an arithmetic number, because the mean of its divisors is an integer number (200039846268).

Almost surely, 2^{1200221102121} is an apocalyptic number.

It is an amenable number.

1200221102121 is a deficient number, since it is larger than the sum of its proper divisors (400097668023).

1200221102121 is an equidigital number, since it uses as much as digits as its factorization.

1200221102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5991831.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1200221102121 its reverse (1212011220021), we get a palindrome (2412232322142).

The spelling of 1200221102121 in words is "one trillion, two hundred billion, two hundred twenty-one million, one hundred two thousand, one hundred twenty-one".