121430142421 has 16 divisors (see below), whose sum is σ = 139109604480. Its totient is φ = 103834048320.

The previous prime is 121430142391. The next prime is 121430142467. The reversal of 121430142421 is 124241034121.

It is a cyclic number.

It is not a de Polignac number, because 121430142421 - 2⁵ = 121430142389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430142221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5352915 + ... + 5375551.

It is an arithmetic number, because the mean of its divisors is an integer number (8694350280).

Almost surely, 2^121430142421 is an apocalyptic number.

It is an amenable number.

121430142421 is a deficient number, since it is larger than the sum of its proper divisors (17679462059).

121430142421 is a wasteful number, since it uses less digits than its factorization.

121430142421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24444.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 121430142421 its reverse (124241034121), we get a palindrome (245671176542).

The spelling of 121430142421 in words is "one hundred twenty-one billion, four hundred thirty million, one hundred forty-two thousand, four hundred twenty-one".