121135309421 has 16 divisors (see below), whose sum is σ = 138859106304. Its totient is φ = 103516374384.

The previous prime is 121135309411. The next prime is 121135309433. The reversal of 121135309421 is 124903531121.

It is a cyclic number.

It is not a de Polignac number, because 121135309421 - 2²² = 121131115117 is a prime.

It is a super-2 number, since 2×121135309421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121135309411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13978736 + ... + 13987398.

It is an arithmetic number, because the mean of its divisors is an integer number (8678694144).

Almost surely, 2^121135309421 is an apocalyptic number.

It is an amenable number.

121135309421 is a deficient number, since it is larger than the sum of its proper divisors (17723796883).

121135309421 is an equidigital number, since it uses as much as digits as its factorization.

121135309421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14480.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 121135309421 in words is "one hundred twenty-one billion, one hundred thirty-five million, three hundred nine thousand, four hundred twenty-one".