1201220101121 has 8 divisors (see below), whose sum is σ = 1201782043560. Its totient is φ = 1200658249728.

The previous prime is 1201220101117. The next prime is 1201220101157. The reversal of 1201220101121 is 1211010221021.

It can be written as a sum of positive squares in 4 ways, for example, as 14621646400 + 1186598454721 = 120920^2 + 1089311^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1201220101121 - 2² = 1201220101117 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 = 1201220101096 and 1201220101105.

It is not an unprimeable number, because it can be changed into a prime (1201220101721) 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, 48273935 + ... + 48298811.

It is an arithmetic number, because the mean of its divisors is an integer number (150222755445).

Almost surely, 2^{1201220101121} is an apocalyptic number.

It is an amenable number.

1201220101121 is a deficient number, since it is larger than the sum of its proper divisors (561942439).

1201220101121 is a wasteful number, since it uses less digits than its factorization.

1201220101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45523.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201220101121 its reverse (1211010221021), we get a palindrome (2412230322142).

The spelling of 1201220101121 in words is "one trillion, two hundred one billion, two hundred twenty million, one hundred one thousand, one hundred twenty-one".