121223570 has 32 divisors (see below), whose sum is σ = 245210112. Its totient is φ = 42812352.

The previous prime is 121223551. The next prime is 121223611. The reversal of 121223570 is 75322121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17282 + ... + 23261.

It is an arithmetic number, because the mean of its divisors is an integer number (7662816).

Almost surely, 2^121223570 is an apocalyptic number.

121223570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121223570 is an abundant number, since it is smaller than the sum of its proper divisors (123986542).

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

121223570 is a wasteful number, since it uses less digits than its factorization.

121223570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40586.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 121223570 is about 11010.1575828868. The cubic root of 121223570 is about 494.9131841080.

Adding to 121223570 its reverse (75322121), we get a palindrome (196545691).

The spelling of 121223570 in words is "one hundred twenty-one million, two hundred twenty-three thousand, five hundred seventy".