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BaseRepresentation
bin10100100110100001…
…101110001000111111
32010002122221220221001
4110212201232020333
5330301012213211
614055022151131
71412120120605
oct244641561077
963078856831
1022121210431
1194219348a1
1243544224a7
132116cb0b38
1410dbcd3875
158970c2ac1
hex52686e23f

22121210431 has 2 divisors, whose sum is σ = 22121210432. Its totient is φ = 22121210430.

The previous prime is 22121210429. The next prime is 22121210459. The reversal of 22121210431 is 13401212122.

Adding to 22121210431 its reverse (13401212122), we get a palindrome (35522422553).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121210431 - 21 = 22121210429 is a prime.

It is a super-2 number, since 2×221212104312 (a number of 21 digits) contains 22 as substring.

Together with 22121210429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22121210399 and 22121210408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121210131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060605215 + 11060605216.

It is an arithmetic number, because the mean of its divisors is an integer number (11060605216).

Almost surely, 222121210431 is an apocalyptic number.

22121210431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121210431 is an equidigital number, since it uses as much as digits as its factorization.

22121210431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The spelling of 22121210431 in words is "twenty-two billion, one hundred twenty-one million, two hundred ten thousand, four hundred thirty-one".