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20122031 is a prime number
BaseRepresentation
bin100110011000…
…0100110101111
31101212022020102
41030300212233
520122401111
61555141315
7333014546
oct114604657
941768212
1020122031
11103a3a86
1268a483b
134226b37
14295b15d
151b7713b
hex13309af

20122031 has 2 divisors, whose sum is σ = 20122032. Its totient is φ = 20122030.

The previous prime is 20121989. The next prime is 20122049. The reversal of 20122031 is 13022102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20122031 - 26 = 20121967 is a prime.

It is a super-3 number, since 3×201220313 (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122051) 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, 10061015 + 10061016.

It is an arithmetic number, because the mean of its divisors is an integer number (10061016).

Almost surely, 220122031 is an apocalyptic number.

20122031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122031 is an equidigital number, since it uses as much as digits as its factorization.

20122031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20122031 is about 4485.7586872234. The cubic root of 20122031 is about 271.9927144459.

Adding to 20122031 its reverse (13022102), we get a palindrome (33144133).

The spelling of 20122031 in words is "twenty million, one hundred twenty-two thousand, thirty-one".