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12210321997 is a prime number
BaseRepresentation
bin10110101111100101…
…01011101001001101
31011111221212121220001
423113302223221031
5200001320300442
65335341324301
7611404011256
oct132762535115
934457777801
1012210321997
1151a6454705
122449266691
1311c78c4103
1483b929b2d
154b6e682b7
hex2d7caba4d

12210321997 has 2 divisors, whose sum is σ = 12210321998. Its totient is φ = 12210321996.

The previous prime is 12210321967. The next prime is 12210322021. The reversal of 12210321997 is 79912301221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12061750276 + 148571721 = 109826^2 + 12189^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210321997 - 211 = 12210319949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12210321967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105160998 + 6105160999.

It is an arithmetic number, because the mean of its divisors is an integer number (6105160999).

Almost surely, 212210321997 is an apocalyptic number.

It is an amenable number.

12210321997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210321997 is an equidigital number, since it uses as much as digits as its factorization.

12210321997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 12210321997 in words is "twelve billion, two hundred ten million, three hundred twenty-one thousand, nine hundred ninety-seven".