1201021111011 has 8 divisors (see below), whose sum is σ = 1609490220624. Its totient is φ = 796616371040.

The previous prime is 1201021110997. The next prime is 1201021111013. The reversal of 1201021111011 is 1101111201021.

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 1201021111011 - 2²⁵ = 1200987556579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201021111013) 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, 1016091720 + ... + 1016092901.

It is an arithmetic number, because the mean of its divisors is an integer number (201186277578).

Almost surely, 2^{1201021111011} is an apocalyptic number.

1201021111011 is a deficient number, since it is larger than the sum of its proper divisors (408469109613).

1201021111011 is a wasteful number, since it uses less digits than its factorization.

1201021111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032184821.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1201021111011 its reverse (1101111201021), we get a palindrome (2302132312032).

The spelling of 1201021111011 in words is "one trillion, two hundred one billion, twenty-one million, one hundred eleven thousand, eleven".