121212423401 has 16 divisors (see below), whose sum is σ = 130303893888. Its totient is φ = 112342675200.

The previous prime is 121212423383. The next prime is 121212423403. The reversal of 121212423401 is 104324212121.

It is not a de Polignac number, because 121212423401 - 2²² = 121208229097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212423403) 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, 970706 + ... + 1088436.

It is an arithmetic number, because the mean of its divisors is an integer number (8143993368).

Almost surely, 2^121212423401 is an apocalyptic number.

It is an amenable number.

121212423401 is a deficient number, since it is larger than the sum of its proper divisors (9091470487).

121212423401 is a wasteful number, since it uses less digits than its factorization.

121212423401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118672.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 121212423401 its reverse (104324212121), we get a palindrome (225536635522).

The spelling of 121212423401 in words is "one hundred twenty-one billion, two hundred twelve million, four hundred twenty-three thousand, four hundred one".