121655262543 has 32 divisors (see below), whose sum is σ = 170064893952. Its totient is φ = 77209017600.

The previous prime is 121655262523. The next prime is 121655262683. The reversal of 121655262543 is 345262556121.

It is not a de Polignac number, because 121655262543 - 2⁹ = 121655262031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121655262495 and 121655262504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121655262523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13188673 + ... + 13197893.

It is an arithmetic number, because the mean of its divisors is an integer number (5314527936).

Almost surely, 2^121655262543 is an apocalyptic number.

121655262543 is a deficient number, since it is larger than the sum of its proper divisors (48409631409).

121655262543 is a wasteful number, since it uses less digits than its factorization.

121655262543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10135.

The product of its digits is 432000, while the sum is 42.

The spelling of 121655262543 in words is "one hundred twenty-one billion, six hundred fifty-five million, two hundred sixty-two thousand, five hundred forty-three".