6121755220 has 36 divisors (see below), whose sum is σ = 14954575860. Its totient is φ = 2098887168.

The previous prime is 6121755181. The next prime is 6121755257. The reversal of 6121755220 is 225571216.

It can be written as a sum of positive squares in 2 ways, for example, as 1452219664 + 4669535556 = 38108^2 + 68334^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3122365 + ... + 3124324.

It is an arithmetic number, because the mean of its divisors is an integer number (415404885).

Almost surely, 2^6121755220 is an apocalyptic number.

It is an amenable number.

6121755220 is an abundant number, since it is smaller than the sum of its proper divisors (8832820640).

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

6121755220 is a wasteful number, since it uses less digits than its factorization.

6121755220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6246712 (or 6246703 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 6121755220 is about 78241.6463272598. The cubic root of 6121755220 is about 1829.3297056421.

The spelling of 6121755220 in words is "six billion, one hundred twenty-one million, seven hundred fifty-five thousand, two hundred twenty".