121026913 has 6 divisors (see below), whose sum is σ = 140786466. Its totient is φ = 103737312.

The previous prime is 121026823. The next prime is 121026923. The reversal of 121026913 is 319620121.

It can be written as a sum of positive squares in only one way, i.e., 82301184 + 38725729 = 9072^2 + 6223^2 .

It is not a de Polignac number, because 121026913 - 2²¹ = 118929761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121026923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1234920 + ... + 1235017.

It is an arithmetic number, because the mean of its divisors is an integer number (23464411).

Almost surely, 2^121026913 is an apocalyptic number.

It is an amenable number.

121026913 is a deficient number, since it is larger than the sum of its proper divisors (19759553).

121026913 is an equidigital number, since it uses as much as digits as its factorization.

121026913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469951 (or 2469944 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 121026913 is about 11001.2232501663. The cubic root of 121026913 is about 494.6454121440.

The spelling of 121026913 in words is "one hundred twenty-one million, twenty-six thousand, nine hundred thirteen".