121111200211011 has 4 divisors (see below), whose sum is σ = 161481600281352. Its totient is φ = 80740800140672.

The previous prime is 121111200211007. The next prime is 121111200211049. The reversal of 121111200211011 is 110112002111121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121111200211011 - 2² = 121111200211007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121111200213011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20185200035166 + ... + 20185200035171.

It is an arithmetic number, because the mean of its divisors is an integer number (40370400070338).

Almost surely, 2^{121111200211011} is an apocalyptic number.

121111200211011 is a deficient number, since it is larger than the sum of its proper divisors (40370400070341).

121111200211011 is an equidigital number, since it uses as much as digits as its factorization.

121111200211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40370400070340.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121111200211011 its reverse (110112002111121), we get a palindrome (231223202322132).

The spelling of 121111200211011 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred million, two hundred eleven thousand, eleven".