121403732440505 has 8 divisors (see below), whose sum is σ = 145685239402824. Its totient is φ = 97122478969600.

The previous prime is 121403732440489. The next prime is 121403732440519. The reversal of 121403732440505 is 505044237304121.

It can be written as a sum of positive squares in 4 ways, for example, as 57073371214864 + 64330361225641 = 7554692^2 + 8020621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121403732440505 - 2⁴ = 121403732440489 is a prime.

It is a super-2 number, since 2×121403732440505² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62317616 + ... + 64236225.

It is an arithmetic number, because the mean of its divisors is an integer number (18210654925353).

Almost surely, 2^{121403732440505} is an apocalyptic number.

It is an amenable number.

121403732440505 is a deficient number, since it is larger than the sum of its proper divisors (24281506962319).

121403732440505 is a wasteful number, since it uses less digits than its factorization.

121403732440505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126745707.

The product of its (nonzero) digits is 403200, while the sum is 41.

Adding to 121403732440505 its reverse (505044237304121), we get a palindrome (626447969744626).

The spelling of 121403732440505 in words is "one hundred twenty-one trillion, four hundred three billion, seven hundred thirty-two million, four hundred forty thousand, five hundred five".