121105420 has 24 divisors (see below), whose sum is σ = 257544000. Its totient is φ = 47828352.

The previous prime is 121105409. The next prime is 121105423. The reversal of 121105420 is 24501121.

It is a junction number, because it is equal to n+sod(n) for n = 121105394 and 121105403.

It is not an unprimeable number, because it can be changed into a prime (121105423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36745 + ... + 39904.

It is an arithmetic number, because the mean of its divisors is an integer number (10731000).

Almost surely, 2^121105420 is an apocalyptic number.

121105420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121105420 is an abundant number, since it is smaller than the sum of its proper divisors (136438580).

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

121105420 is a wasteful number, since it uses less digits than its factorization.

121105420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76737 (or 76735 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 121105420 is about 11004.7907749307. The cubic root of 121105420 is about 494.7523435495.

Adding to 121105420 its reverse (24501121), we get a palindrome (145606541).

The spelling of 121105420 in words is "one hundred twenty-one million, one hundred five thousand, four hundred twenty".