12121021001111 has 8 divisors (see below), whose sum is σ = 13223066897424. Its totient is φ = 11018997587520.

The previous prime is 12121021001107. The next prime is 12121021001143. The reversal of 12121021001111 is 11110012012121.

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 12121021001111 - 2² = 12121021001107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121021001161) 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, 4483406 + ... + 6659051.

It is an arithmetic number, because the mean of its divisors is an integer number (1652883362178).

Almost surely, 2^{12121021001111} is an apocalyptic number.

12121021001111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12121021001111 is a deficient number, since it is larger than the sum of its proper divisors (1102045896313).

12121021001111 is a wasteful number, since it uses less digits than its factorization.

12121021001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11241361.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12121021001111 its reverse (11110012012121), we get a palindrome (23231033013232).

The spelling of 12121021001111 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, one thousand, one hundred eleven".