121000520 has 32 divisors (see below), whose sum is σ = 274406400. Its totient is φ = 48017088.

The previous prime is 121000519. The next prime is 121000549. The reversal of 121000520 is 25000121.

It is a super-2 number, since 2×121000520² = 29282251680540800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6830 + ... + 16989.

It is an arithmetic number, because the mean of its divisors is an integer number (8575200).

Almost surely, 2^121000520 is an apocalyptic number.

121000520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000520 is an abundant number, since it is smaller than the sum of its proper divisors (153405880).

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

121000520 is a wasteful number, since it uses less digits than its factorization.

121000520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23957 (or 23953 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 121000520 is about 11000.0236363382. The cubic root of 121000520 is about 494.6094528543.

Adding to 121000520 its reverse (25000121), we get a palindrome (146000641).

The spelling of 121000520 in words is "one hundred twenty-one million, five hundred twenty", and thus it is an aban number.