121400311 has 4 divisors (see below), whose sum is σ = 121466800. Its totient is φ = 121333824.

The previous prime is 121400299. The next prime is 121400339. The reversal of 121400311 is 113004121.

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 121400311 - 2¹³ = 121392119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121400291 and 121400300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121400341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30426 + ... + 34183.

It is an arithmetic number, because the mean of its divisors is an integer number (30366700).

Almost surely, 2^121400311 is an apocalyptic number.

121400311 is a deficient number, since it is larger than the sum of its proper divisors (66489).

121400311 is an equidigital number, since it uses as much as digits as its factorization.

121400311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66488.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121400311 is about 11018.1809297179. The cubic root of 121400311 is about 495.1535910824.

Adding to 121400311 its reverse (113004121), we get a palindrome (234404432).

The spelling of 121400311 in words is "one hundred twenty-one million, four hundred thousand, three hundred eleven".