121884881 has 4 divisors (see below), whose sum is σ = 123091764. Its totient is φ = 120678000.

The previous prime is 121884871. The next prime is 121884911. The reversal of 121884881 is 188488121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188488121 = 5171 ⋅36451.

It can be written as a sum of positive squares in 2 ways, for example, as 58140625 + 63744256 = 7625^2 + 7984^2 .

It is a cyclic number.

It is not a de Polignac number, because 121884881 - 2⁶ = 121884817 is a prime.

It is a super-2 number, since 2×121884881² = 29711848432768322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121884871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603290 + ... + 603491.

It is an arithmetic number, because the mean of its divisors is an integer number (30772941).

Almost surely, 2^121884881 is an apocalyptic number.

It is an amenable number.

121884881 is a deficient number, since it is larger than the sum of its proper divisors (1206883).

121884881 is a wasteful number, since it uses less digits than its factorization.

121884881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206882.

The product of its digits is 32768, while the sum is 41.

The square root of 121884881 is about 11040.1485950145. The cubic root of 121884881 is about 495.8115192311.

The spelling of 121884881 in words is "one hundred twenty-one million, eight hundred eighty-four thousand, eight hundred eighty-one".