121243312214021 has 8 divisors (see below), whose sum is σ = 125424901202400. Its totient is φ = 117061775566960.

The previous prime is 121243312213993. The next prime is 121243312214039. The reversal of 121243312214021 is 120412213342121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121243312214021 - 2³⁰ = 121242238472197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121243312264021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8343515 + ... + 17666376.

It is an arithmetic number, because the mean of its divisors is an integer number (15678112650300).

Almost surely, 2^{121243312214021} is an apocalyptic number.

It is an amenable number.

121243312214021 is a deficient number, since it is larger than the sum of its proper divisors (4181588988379).

121243312214021 is a wasteful number, since it uses less digits than its factorization.

121243312214021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26170659.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 121243312214021 its reverse (120412213342121), we get a palindrome (241655525556142).

The spelling of 121243312214021 in words is "one hundred twenty-one trillion, two hundred forty-three billion, three hundred twelve million, two hundred fourteen thousand, twenty-one".