1201011121 has 16 divisors (see below), whose sum is σ = 1295123904. Its totient is φ = 1109699584.

The previous prime is 1201011107. The next prime is 1201011131. The reversal of 1201011121 is 1211101021.

It is a cyclic number.

It is not a de Polignac number, because 1201011121 - 2²⁷ = 1066793393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201011098 and 1201011107.

It is not an unprimeable number, because it can be changed into a prime (1201011131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202626 + ... + 208468.

It is an arithmetic number, because the mean of its divisors is an integer number (80945244).

Almost surely, 2^1201011121 is an apocalyptic number.

It is an amenable number.

1201011121 is a deficient number, since it is larger than the sum of its proper divisors (94112783).

1201011121 is a wasteful number, since it uses less digits than its factorization.

1201011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6080.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1201011121 is about 34655.6073529234. The cubic root of 1201011121 is about 1062.9569510580.

Adding to 1201011121 its reverse (1211101021), we get a palindrome (2412112142).

The spelling of 1201011121 in words is "one billion, two hundred one million, eleven thousand, one hundred twenty-one".