121351304314021 has 4 divisors (see below), whose sum is σ = 126627447979872. Its totient is φ = 116075160648172.

The previous prime is 121351304313989. The next prime is 121351304314039. The reversal of 121351304314021 is 120413403153121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121351304314021 - 2⁵ = 121351304313989 is a prime.

It is a super-2 number, since 2×121351304314021² (a number of 29 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 (121351304318021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2638071832891 + ... + 2638071832936.

It is an arithmetic number, because the mean of its divisors is an integer number (31656861994968).

Almost surely, 2^{121351304314021} is an apocalyptic number.

It is an amenable number.

121351304314021 is a deficient number, since it is larger than the sum of its proper divisors (5276143665851).

121351304314021 is an equidigital number, since it uses as much as digits as its factorization.

121351304314021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276143665850.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 121351304314021 its reverse (120413403153121), we get a palindrome (241764707467142).

The spelling of 121351304314021 in words is "one hundred twenty-one trillion, three hundred fifty-one billion, three hundred four million, three hundred fourteen thousand, twenty-one".