121867474955 has 4 divisors (see below), whose sum is σ = 146240969952. Its totient is φ = 97493979960.

The previous prime is 121867474931. The next prime is 121867475069. The reversal of 121867474955 is 559474768121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 559474768121 = 619 ⋅903836459.

It is not a de Polignac number, because 121867474955 - 2¹² = 121867470859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121867474894 and 121867474903.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12186747491 + ... + 12186747500.

It is an arithmetic number, because the mean of its divisors is an integer number (36560242488).

Almost surely, 2^121867474955 is an apocalyptic number.

121867474955 is a deficient number, since it is larger than the sum of its proper divisors (24373494997).

121867474955 is an equidigital number, since it uses as much as digits as its factorization.

121867474955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24373494996.

The product of its digits is 16934400, while the sum is 59.

The spelling of 121867474955 in words is "one hundred twenty-one billion, eight hundred sixty-seven million, four hundred seventy-four thousand, nine hundred fifty-five".