121121022211111 has 24 divisors (see below), whose sum is σ = 133307647660320. Its totient is φ = 109968813302400.

The previous prime is 121121022211103. The next prime is 121121022211139. The reversal of 121121022211111 is 111112220121121.

It is not a de Polignac number, because 121121022211111 - 2³ = 121121022211103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121022218111) 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 23 ways as a sum of consecutive naturals, for example, 638867350 + ... + 639056908.

It is an arithmetic number, because the mean of its divisors is an integer number (5554485319180).

Almost surely, 2^{121121022211111} is an apocalyptic number.

121121022211111 is a deficient number, since it is larger than the sum of its proper divisors (12186625449209).

121121022211111 is a wasteful number, since it uses less digits than its factorization.

121121022211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251627 (or 251614 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121121022211111 its reverse (111112220121121), we get a palindrome (232233242332232).

The spelling of 121121022211111 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty-two million, two hundred eleven thousand, one hundred eleven".