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1222002121 = 23157338411
BaseRepresentation
bin100100011010110…
…0100010111001001
310011011102010202211
41020311210113021
510000313031441
6321131425121
742165563254
oct11065442711
93134363684
101222002121
1157787430a
122a12b51a1
13166228ca2
14b841a09b
1572434a81
hex48d645c9

1222002121 has 8 divisors (see below), whose sum is σ = 1283258304. Its totient is φ = 1161423120.

The previous prime is 1222002107. The next prime is 1222002137. The reversal of 1222002121 is 1212002221.

Adding to 1222002121 its reverse (1212002221), we get a palindrome (2434004342).

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1222002121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222002181) 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, 165595 + ... + 172816.

It is an arithmetic number, because the mean of its divisors is an integer number (160407288).

Almost surely, 21222002121 is an apocalyptic number.

It is an amenable number.

1222002121 is a deficient number, since it is larger than the sum of its proper divisors (61256183).

1222002121 is a wasteful number, since it uses less digits than its factorization.

1222002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338591.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1222002121 is about 34957.1469230542. The cubic root of 1222002121 is about 1069.1139259432.

The spelling of 1222002121 in words is "one billion, two hundred twenty-two million, two thousand, one hundred twenty-one".

Divisors: 1 23 157 3611 338411 7783453 53130527 1222002121