121137570 has 24 divisors (see below), whose sum is σ = 314957916. Its totient is φ = 32303328.

The previous prime is 121137557. The next prime is 121137571. The reversal of 121137570 is 75731121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 101183481 + 19954089 = 10059^2 + 4467^2 .

It is not an unprimeable number, because it can be changed into a prime (121137571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 672897 + ... + 673076.

Almost surely, 2^121137570 is an apocalyptic number.

121137570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121137570 is an abundant number, since it is smaller than the sum of its proper divisors (193820346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121137570 is a wasteful number, since it uses less digits than its factorization.

121137570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345986 (or 1345983 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 121137570 is about 11006.2514054514. The cubic root of 121137570 is about 494.7961205070.

Adding to 121137570 its reverse (75731121), we get a palindrome (196868691).

It can be divided in two parts, 12113 and 7570, that added together give a 9-th power (19683 = 3⁹).

The spelling of 121137570 in words is "one hundred twenty-one million, one hundred thirty-seven thousand, five hundred seventy".