121121021111 has 8 divisors (see below), whose sum is σ = 121596908400. Its totient is φ = 120645324160.

The previous prime is 121121021101. The next prime is 121121021129. The reversal of 121121021111 is 111120121121.

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 121121021111 - 2²⁶ = 121053912247 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 (121121021101) 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, 1302476 + ... + 1392366.

It is an arithmetic number, because the mean of its divisors is an integer number (15199613550).

Almost surely, 2^121121021111 is an apocalyptic number.

121121021111 is a deficient number, since it is larger than the sum of its proper divisors (475887289).

121121021111 is an equidigital number, since it uses as much as digits as its factorization.

121121021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95169.

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

Adding to 121121021111 its reverse (111120121121), we get a palindrome (232241142232).

It can be divided in two parts, 1211210 and 21111, that added together give a palindrome (1232321).

The spelling of 121121021111 in words is "one hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, one hundred eleven".