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21213363129989 is a prime number
BaseRepresentation
bin1001101001011000111101…
…11110010100111010000101
32210002222101202020221210112
410310230132332110322011
510240024431430124424
6113041141241002405
74316420625323402
oct464543676247205
983088352227715
1021213363129989
11683959a501508
122467360483405
13bab547272a44
14534a374392a9
1526bc1cd0260e
hex134b1ef94e85

21213363129989 has 2 divisors, whose sum is σ = 21213363129990. Its totient is φ = 21213363129988.

The previous prime is 21213363129953. The next prime is 21213363130067. The reversal of 21213363129989 is 98992136331212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20422716722500 + 790646407489 = 4519150^2 + 889183^2 .

It is a cyclic number.

It is not a de Polignac number, because 21213363129989 - 212 = 21213363125893 is a prime.

It is a super-2 number, since 2×212133631299892 (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213363129089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606681564994 + 10606681564995.

It is an arithmetic number, because the mean of its divisors is an integer number (10606681564995).

Almost surely, 221213363129989 is an apocalyptic number.

It is an amenable number.

21213363129989 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213363129989 is an equidigital number, since it uses as much as digits as its factorization.

21213363129989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7558272, while the sum is 59.

The spelling of 21213363129989 in words is "twenty-one trillion, two hundred thirteen billion, three hundred sixty-three million, one hundred twenty-nine thousand, nine hundred eighty-nine".