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202121137 is a prime number
BaseRepresentation
bin11000000110000…
…01111110110001
3112002022211002001
430003001332301
5403220334022
632020054001
75003000311
oct1403017661
9462284061
10202121137
11a4101669
1257834301
1332b4a90a
141cbb5441
1512b27b27
hexc0c1fb1

202121137 has 2 divisors, whose sum is σ = 202121138. Its totient is φ = 202121136.

The previous prime is 202121081. The next prime is 202121189. The reversal of 202121137 is 731121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153735201 + 48385936 = 12399^2 + 6956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-202121137 is a prime.

It is not a weakly prime, because it can be changed into another prime (202121237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060568 + 101060569.

It is an arithmetic number, because the mean of its divisors is an integer number (101060569).

Almost surely, 2202121137 is an apocalyptic number.

It is an amenable number.

202121137 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121137 is an equidigital number, since it uses as much as digits as its factorization.

202121137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 202121137 is about 14216.9313496268. The cubic root of 202121137 is about 586.8636956944.

Adding to 202121137 its reverse (731121202), we get a palindrome (933242339).

The spelling of 202121137 in words is "two hundred two million, one hundred twenty-one thousand, one hundred thirty-seven".