121286920 has 32 divisors (see below), whose sum is σ = 273556800. Its totient is φ = 48397248.

The previous prime is 121286909. The next prime is 121286927. The reversal of 121286920 is 29682121.

It is not an unprimeable number, because it can be changed into a prime (121286927) 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, 14107 + ... + 21013.

It is an arithmetic number, because the mean of its divisors is an integer number (8548650).

Almost surely, 2^121286920 is an apocalyptic number.

121286920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121286920 is an abundant number, since it is smaller than the sum of its proper divisors (152269880).

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

121286920 is a wasteful number, since it uses less digits than its factorization.

121286920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7357 (or 7353 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 121286920 is about 11013.0340960155. The cubic root of 121286920 is about 494.9993810148. Note that the first 3 decimals are identical.

The spelling of 121286920 in words is "one hundred twenty-one million, two hundred eighty-six thousand, nine hundred twenty".