121311222311 has 16 divisors (see below), whose sum is σ = 124902139968. Its totient is φ = 117770016000.

The previous prime is 121311222299. The next prime is 121311222349. The reversal of 121311222311 is 113222113121.

It is a cyclic number.

It is not a de Polignac number, because 121311222311 - 2¹⁰ = 121311221287 is a prime.

It is a super-3 number, since 3×121311222311³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311222611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9795155 + ... + 9807531.

It is an arithmetic number, because the mean of its divisors is an integer number (7806383748).

Almost surely, 2^121311222311 is an apocalyptic number.

121311222311 is a deficient number, since it is larger than the sum of its proper divisors (3590917657).

121311222311 is a wasteful number, since it uses less digits than its factorization.

121311222311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14362.

The product of its digits is 144, while the sum is 20.

Adding to 121311222311 its reverse (113222113121), we get a palindrome (234533335432).

The spelling of 121311222311 in words is "one hundred twenty-one billion, three hundred eleven million, two hundred twenty-two thousand, three hundred eleven".