1201121001011 has 8 divisors (see below), whose sum is σ = 1237965210384. Its totient is φ = 1164636247680.

The previous prime is 1201121000969. The next prime is 1201121001109. The reversal of 1201121001011 is 1101001211021.

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 1201121001011 - 2¹⁴ = 1201120984627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201121000983 and 1201121001001.

It is not an unprimeable number, because it can be changed into a prime (1201121301011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89857226 + ... + 89870591.

It is an arithmetic number, because the mean of its divisors is an integer number (154745651298).

Almost surely, 2^{1201121001011} is an apocalyptic number.

1201121001011 is a deficient number, since it is larger than the sum of its proper divisors (36844209373).

1201121001011 is a wasteful number, since it uses less digits than its factorization.

1201121001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179728021.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1201121001011 its reverse (1101001211021), we get a palindrome (2302122212032).

The spelling of 1201121001011 in words is "one trillion, two hundred one billion, one hundred twenty-one million, one thousand, eleven".