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BaseRepresentation
bin10011101010010000…
…101001000000000011
32000111012101012010111
4103222100221000003
5321213141144341
613410422412151
71345061613652
oct235220510003
960435335114
1021110099971
118a53112614
124111891057
131cb568381c
1410438d3199
15838449681
hex4ea429003

21110099971 has 2 divisors, whose sum is σ = 21110099972. Its totient is φ = 21110099970.

The previous prime is 21110099909. The next prime is 21110100023. The reversal of 21110099971 is 17999001112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110099971 - 217 = 21109968899 is a prime.

It is a super-2 number, since 2×211100999712 (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21110099671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555049985 + 10555049986.

It is an arithmetic number, because the mean of its divisors is an integer number (10555049986).

Almost surely, 221110099971 is an apocalyptic number.

21110099971 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110099971 is an equidigital number, since it uses as much as digits as its factorization.

21110099971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 40.

The spelling of 21110099971 in words is "twenty-one billion, one hundred ten million, ninety-nine thousand, nine hundred seventy-one".