121255100534 has 4 divisors (see below), whose sum is σ = 181882650804. Its totient is φ = 60627550266.

The previous prime is 121255100503. The next prime is 121255100569. The reversal of 121255100534 is 435001552121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 435001552121 = 89 ⋅4887657889.

It is a junction number, because it is equal to n+sod(n) for n = 121255100497 and 121255100506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30313775132 + ... + 30313775135.

It is an arithmetic number, because the mean of its divisors is an integer number (45470662701).

Almost surely, 2^121255100534 is an apocalyptic number.

121255100534 is a deficient number, since it is larger than the sum of its proper divisors (60627550270).

121255100534 is an equidigital number, since it uses as much as digits as its factorization.

121255100534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60627550269.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 121255100534 its reverse (435001552121), we get a palindrome (556256652655).

The spelling of 121255100534 in words is "one hundred twenty-one billion, two hundred fifty-five million, one hundred thousand, five hundred thirty-four".