121311223201 has 12 divisors (see below), whose sum is σ = 141178971648. Its totient is φ = 103935486312.

The previous prime is 121311223181. The next prime is 121311223213. The reversal of 121311223201 is 102322113121.

It is not a de Polignac number, because 121311223201 - 2¹⁷ = 121311092129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121311223001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 429201 + ... + 653326.

It is an arithmetic number, because the mean of its divisors is an integer number (11764914304).

Almost surely, 2^121311223201 is an apocalyptic number.

It is an amenable number.

121311223201 is a deficient number, since it is larger than the sum of its proper divisors (19867748447).

121311223201 is a wasteful number, since it uses less digits than its factorization.

121311223201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084828 (or 1084821 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121311223201 its reverse (102322113121), we get a palindrome (223633336322).

The spelling of 121311223201 in words is "one hundred twenty-one billion, three hundred eleven million, two hundred twenty-three thousand, two hundred one".