121421201435 has 16 divisors (see below), whose sum is σ = 148548405600. Its totient is φ = 95249949696.

The previous prime is 121421201351. The next prime is 121421201471. The reversal of 121421201435 is 534102124121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121421201435 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401270 + ... + 635499.

It is an arithmetic number, because the mean of its divisors is an integer number (9284275350).

Almost surely, 2^121421201435 is an apocalyptic number.

121421201435 is a deficient number, since it is larger than the sum of its proper divisors (27127204165).

121421201435 is a wasteful number, since it uses less digits than its factorization.

121421201435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037230.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 121421201435 its reverse (534102124121), we get a palindrome (655523325556).

The spelling of 121421201435 in words is "one hundred twenty-one billion, four hundred twenty-one million, two hundred one thousand, four hundred thirty-five".