121223021113111 has 4 divisors (see below), whose sum is σ = 121499155558000. Its totient is φ = 120946886668224.

The previous prime is 121223021113097. The next prime is 121223021113123. The reversal of 121223021113111 is 111311120322121.

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 121223021113111 - 2³⁷ = 121085582159639 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 (121223021113511) 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, 138067221786 + ... + 138067222663.

It is an arithmetic number, because the mean of its divisors is an integer number (30374788889500).

Almost surely, 2^{121223021113111} is an apocalyptic number.

121223021113111 is a deficient number, since it is larger than the sum of its proper divisors (276134444889).

121223021113111 is an equidigital number, since it uses as much as digits as its factorization.

121223021113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276134444888.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 121223021113111 its reverse (111311120322121), we get a palindrome (232534141435232).

The spelling of 121223021113111 in words is "one hundred twenty-one trillion, two hundred twenty-three billion, twenty-one million, one hundred thirteen thousand, one hundred eleven".