1201211121 has 8 divisors (see below), whose sum is σ = 1747216224. Its totient is φ = 728006720.

The previous prime is 1201211119. The next prime is 1201211147. The reversal of 1201211121 is 1211121021.

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 1201211121 - 2¹ = 1201211119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201211097 and 1201211106.

It is not an unprimeable number, because it can be changed into a prime (1201211111) 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, 18200136 + ... + 18200201.

It is an arithmetic number, because the mean of its divisors is an integer number (218402028).

Almost surely, 2^1201211121 is an apocalyptic number.

1201211121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201211121 is a deficient number, since it is larger than the sum of its proper divisors (546005103).

1201211121 is a wasteful number, since it uses less digits than its factorization.

1201211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36400351.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1201211121 is about 34658.4927687284. The cubic root of 1201211121 is about 1063.0159512307.

Adding to 1201211121 its reverse (1211121021), we get a palindrome (2412332142).

The spelling of 1201211121 in words is "one billion, two hundred one million, two hundred eleven thousand, one hundred twenty-one".