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21221112001253 is a prime number
BaseRepresentation
bin1001101001100111011001…
…10101111011001011100101
32210010201101210010101211112
410310303230311323023211
510240141314133020003
6113044502210114405
74320113636540663
oct464635465731345
983121353111745
1021221112001253
11684190654514a
12246896357ba05
13bac1b0769778
14535170611c33
1526c0232443d8
hex134cecd7b2e5

21221112001253 has 2 divisors, whose sum is σ = 21221112001254. Its totient is φ = 21221112001252.

The previous prime is 21221112001097. The next prime is 21221112001301. The reversal of 21221112001253 is 35210021112212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17054116493569 + 4166995507684 = 4129663^2 + 2041322^2 .

It is a cyclic number.

It is not a de Polignac number, because 21221112001253 - 218 = 21221111739109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221112001853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610556000626 + 10610556000627.

It is an arithmetic number, because the mean of its divisors is an integer number (10610556000627).

Almost surely, 221221112001253 is an apocalyptic number.

It is an amenable number.

21221112001253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221112001253 is an equidigital number, since it uses as much as digits as its factorization.

21221112001253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 21221112001253 its reverse (35210021112212), we get a palindrome (56431133113465).

The spelling of 21221112001253 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, two hundred fifty-three".