121145503729 has 2 divisors, whose sum is σ = 121145503730. Its totient is φ = 121145503728.

The previous prime is 121145503681. The next prime is 121145503741. The reversal of 121145503729 is 927305541121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104685896704 + 16459607025 = 323552^2 + 128295^2 .

It is a cyclic number.

It is not a de Polignac number, because 121145503729 - 2¹⁹ = 121144979441 is a prime.

It is a super-3 number, since 3×121145503729³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121145503691 and 121145503700.

It is not a weakly prime, because it can be changed into another prime (121145503769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60572751864 + 60572751865.

It is an arithmetic number, because the mean of its divisors is an integer number (60572751865).

Almost surely, 2^121145503729 is an apocalyptic number.

It is an amenable number.

121145503729 is a deficient number, since it is larger than the sum of its proper divisors (1).

121145503729 is an equidigital number, since it uses as much as digits as its factorization.

121145503729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 121145503729 in words is "one hundred twenty-one billion, one hundred forty-five million, five hundred three thousand, seven hundred twenty-nine".