61228121 has 8 divisors (see below), whose sum is σ = 61795200. Its totient is φ = 60664032.

The previous prime is 61228117. The next prime is 61228147. The reversal of 61228121 is 12182216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61228121 - 2² = 61228117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61228171) 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, 61796 + ... + 62778.

It is an arithmetic number, because the mean of its divisors is an integer number (7724400).

Almost surely, 2^61228121 is an apocalyptic number.

It is an amenable number.

61228121 is a deficient number, since it is larger than the sum of its proper divisors (567079).

61228121 is a wasteful number, since it uses less digits than its factorization.

61228121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495.

The product of its digits is 384, while the sum is 23.

The square root of 61228121 is about 7824.8399983642. The cubic root of 61228121 is about 394.1398169896.

The spelling of 61228121 in words is "sixty-one million, two hundred twenty-eight thousand, one hundred twenty-one".