1201322222121 has 8 divisors (see below), whose sum is σ = 1830586243264. Its totient is φ = 686469841200.

The previous prime is 1201322222083. The next prime is 1201322222147. The reversal of 1201322222121 is 1212222231021.

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

It is not a de Polignac number, because 1201322222121 - 2⁹ = 1201322221609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 57205820101 = 1201322222121 / (1 + 2 + 0 + 1 + 3 + 2 + 2 + 2 + 2 + 2 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201322222021) 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, 28602910030 + ... + 28602910071.

It is an arithmetic number, because the mean of its divisors is an integer number (228823280408).

Almost surely, 2^{1201322222121} is an apocalyptic number.

It is an amenable number.

1201322222121 is a deficient number, since it is larger than the sum of its proper divisors (629264021143).

1201322222121 is an equidigital number, since it uses as much as digits as its factorization.

1201322222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57205820111.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1201322222121 its reverse (1212222231021), we get a palindrome (2413544453142).

The spelling of 1201322222121 in words is "one trillion, two hundred one billion, three hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".