121203881 has 2 divisors, whose sum is σ = 121203882. Its totient is φ = 121203880.

The previous prime is 121203857. The next prime is 121203899. The reversal of 121203881 is 188302121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106419856 + 14784025 = 10316^2 + 3845^2 .

It is a cyclic number.

It is not a de Polignac number, because 121203881 - 2¹⁴ = 121187497 is a prime.

It is a super-2 number, since 2×121203881² = 29380761538924322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121203881.

It is not a weakly prime, because it can be changed into another prime (121203811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601940 + 60601941.

It is an arithmetic number, because the mean of its divisors is an integer number (60601941).

Almost surely, 2^121203881 is an apocalyptic number.

It is an amenable number.

121203881 is a deficient number, since it is larger than the sum of its proper divisors (1).

121203881 is an equidigital number, since it uses as much as digits as its factorization.

121203881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 121203881 is about 11009.2634176860. The cubic root of 121203881 is about 494.8863882374.

It can be divided in two parts, 1212038 and 81, that multiplied together give a triangular number (98175078 = T₁₄₀₁₂).

The spelling of 121203881 in words is "one hundred twenty-one million, two hundred three thousand, eight hundred eighty-one".