121221111133 has 4 divisors (see below), whose sum is σ = 121427621280. Its totient is φ = 121014600988.

The previous prime is 121221111131. The next prime is 121221111157. The reversal of 121221111133 is 331111122121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121221111133 - 2¹ = 121221111131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121221111133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221111131) 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, 103254193 + ... + 103255366.

It is an arithmetic number, because the mean of its divisors is an integer number (30356905320).

Almost surely, 2^121221111133 is an apocalyptic number.

It is an amenable number.

121221111133 is a deficient number, since it is larger than the sum of its proper divisors (206510147).

121221111133 is an equidigital number, since it uses as much as digits as its factorization.

121221111133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206510146.

The product of its digits is 72, while the sum is 19.

Adding to 121221111133 its reverse (331111122121), we get a palindrome (452332233254).

The spelling of 121221111133 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, one hundred thirty-three".