121430134110021 has 16 divisors (see below), whose sum is σ = 176671490871360. Its totient is φ = 73574920149120.

The previous prime is 121430134110011. The next prime is 121430134110059. The reversal of 121430134110021 is 120011431034121.

It is not a de Polignac number, because 121430134110021 - 2²⁶ = 121430067001157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121430134109973 and 121430134110000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430134110011) 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, 477384016 + ... + 477638313.

It is an arithmetic number, because the mean of its divisors is an integer number (11041968179460).

Almost surely, 2^{121430134110021} is an apocalyptic number.

121430134110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121430134110021 is a deficient number, since it is larger than the sum of its proper divisors (55241356761339).

121430134110021 is a wasteful number, since it uses less digits than its factorization.

121430134110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955026196.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 121430134110021 its reverse (120011431034121), we get a palindrome (241441565144142).

The spelling of 121430134110021 in words is "one hundred twenty-one trillion, four hundred thirty billion, one hundred thirty-four million, one hundred ten thousand, twenty-one".