21550047119 has 2 divisors, whose sum is σ = 21550047120. Its totient is φ = 21550047118.

The previous prime is 21550047107. The next prime is 21550047137. The reversal of 21550047119 is 91174005512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21550047119 - 2¹² = 21550043023 is a prime.

It is a super-2 number, since 2×21550047119² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21550047149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10775023559 + 10775023560.

It is an arithmetic number, because the mean of its divisors is an integer number (10775023560).

Almost surely, 2^21550047119 is an apocalyptic number.

21550047119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21550047119 is an equidigital number, since it uses as much as digits as its factorization.

21550047119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 21550047119 in words is "twenty-one billion, five hundred fifty million, forty-seven thousand, one hundred nineteen".