121762220 has 12 divisors (see below), whose sum is σ = 255700704. Its totient is φ = 48704880.

The previous prime is 121762219. The next prime is 121762297. The reversal of 121762220 is 22267121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3044036 + ... + 3044075.

It is an arithmetic number, because the mean of its divisors is an integer number (21308392).

Almost surely, 2^121762220 is an apocalyptic number.

121762220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121762220 is an abundant number, since it is smaller than the sum of its proper divisors (133938484).

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

121762220 is a wasteful number, since it uses less digits than its factorization.

121762220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6088120 (or 6088118 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 121762220 is about 11034.5919725199. The cubic root of 121762220 is about 495.6451405165.

The spelling of 121762220 in words is "one hundred twenty-one million, seven hundred sixty-two thousand, two hundred twenty".