121001339989 has 2 divisors, whose sum is σ = 121001339990. Its totient is φ = 121001339988.

The previous prime is 121001339941. The next prime is 121001340007. The reversal of 121001339989 is 989933100121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92285326225 + 28716013764 = 303785^2 + 169458^2 .

It is a cyclic number.

It is not a de Polignac number, because 121001339989 - 2¹⁹ = 121000815701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121091339989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500669994 + 60500669995.

It is an arithmetic number, because the mean of its divisors is an integer number (60500669995).

Almost surely, 2^121001339989 is an apocalyptic number.

It is an amenable number.

121001339989 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001339989 is an equidigital number, since it uses as much as digits as its factorization.

121001339989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 46.

The spelling of 121001339989 in words is "one hundred twenty-one billion, one million, three hundred thirty-nine thousand, nine hundred eighty-nine".