64202121 has 12 divisors (see below), whose sum is σ = 97617520. Its totient is φ = 40548600.

The previous prime is 64202111. The next prime is 64202129. The reversal of 64202121 is 12120246.

64202121 is a `hidden beast` number, since 642 + 0 + 2 + 1 + 21 = 666.

It is not a de Polignac number, because 64202121 - 2⁹ = 64201609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64202094 and 64202103.

It is not an unprimeable number, because it can be changed into a prime (64202129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187555 + ... + 187896.

Almost surely, 2^64202121 is an apocalyptic number.

It is an amenable number.

64202121 is a deficient number, since it is larger than the sum of its proper divisors (33415399).

64202121 is a wasteful number, since it uses less digits than its factorization.

64202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375476 (or 375473 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 64202121 is about 8012.6226043662. The cubic root of 64202121 is about 400.4206429105.

Adding to 64202121 its reverse (12120246), we get a palindrome (76322367).

The spelling of 64202121 in words is "sixty-four million, two hundred two thousand, one hundred twenty-one".