21145010147 has 2 divisors, whose sum is σ = 21145010148. Its totient is φ = 21145010146.

The previous prime is 21145010143. The next prime is 21145010153. The reversal of 21145010147 is 74101054112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21145010147 - 2² = 21145010143 is a prime.

It is a super-2 number, since 2×21145010147² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21145010143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572505073 + 10572505074.

It is an arithmetic number, because the mean of its divisors is an integer number (10572505074).

Almost surely, 2^21145010147 is an apocalyptic number.

21145010147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21145010147 is an equidigital number, since it uses as much as digits as its factorization.

21145010147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 21145010147 its reverse (74101054112), we get a palindrome (95246064259).

The spelling of 21145010147 in words is "twenty-one billion, one hundred forty-five million, ten thousand, one hundred forty-seven".