121542104420454 has 8 divisors (see below), whose sum is σ = 243084208840920. Its totient is φ = 40514034806816.

The previous prime is 121542104420419. The next prime is 121542104420459. The reversal of 121542104420454 is 454024401245121.

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

121542104420454 is an admirable number.

It is a super-2 number, since 2×121542104420454² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121542104420459) 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, 10128508701699 + ... + 10128508701710.

It is an arithmetic number, because the mean of its divisors is an integer number (30385526105115).

Almost surely, 2^{121542104420454} is an apocalyptic number.

121542104420454 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121542104420454 is a wasteful number, since it uses less digits than its factorization.

121542104420454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20257017403414.

The product of its (nonzero) digits is 204800, while the sum is 39.

Adding to 121542104420454 its reverse (454024401245121), we get a palindrome (575566505665575).

The spelling of 121542104420454 in words is "one hundred twenty-one trillion, five hundred forty-two billion, one hundred four million, four hundred twenty thousand, four hundred fifty-four".