121214421406 has 32 divisors (see below), whose sum is σ = 202177656576. Its totient is φ = 54126144000.

The previous prime is 121214421403. The next prime is 121214421431. The reversal of 121214421406 is 604124412121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121214421403) 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 15 ways as a sum of consecutive naturals, for example, 3400516 + ... + 3435976.

It is an arithmetic number, because the mean of its divisors is an integer number (6318051768).

Almost surely, 2^121214421406 is an apocalyptic number.

121214421406 is a deficient number, since it is larger than the sum of its proper divisors (80963235170).

121214421406 is a wasteful number, since it uses less digits than its factorization.

121214421406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39748.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 121214421406 its reverse (604124412121), we get a palindrome (725338833527).

The spelling of 121214421406 in words is "one hundred twenty-one billion, two hundred fourteen million, four hundred twenty-one thousand, four hundred six".