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202121099 = 1012001199
BaseRepresentation
bin11000000110000…
…01111110001011
3112002022211000122
430003001332023
5403220333344
632020053455
75003000225
oct1403017613
9462284018
10202121099
11a4101634
125783428b
1332b4a8ab
141cbb5415
1512b27aee
hexc0c1f8b

202121099 has 4 divisors (see below), whose sum is σ = 204122400. Its totient is φ = 200119800.

The previous prime is 202121081. The next prime is 202121137. The reversal of 202121099 is 990121202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202121099 - 220 = 201072523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202121299) 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 in 3 ways as a sum of consecutive naturals, for example, 1000499 + ... + 1000700.

It is an arithmetic number, because the mean of its divisors is an integer number (51030600).

Almost surely, 2202121099 is an apocalyptic number.

202121099 is a deficient number, since it is larger than the sum of its proper divisors (2001301).

202121099 is a wasteful number, since it uses less digits than its factorization.

202121099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001300.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 202121099 is about 14216.9300131920. The cubic root of 202121099 is about 586.8636589164.

The spelling of 202121099 in words is "two hundred two million, one hundred twenty-one thousand, ninety-nine".

Divisors: 1 101 2001199 202121099