21211013147 has 8 divisors (see below), whose sum is σ = 22693406160. Its totient is φ = 19765222560.

The previous prime is 21211013129. The next prime is 21211013189. The reversal of 21211013147 is 74131011212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21211013147 - 2¹² = 21211009051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211013647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9149408 + ... + 9151725.

It is an arithmetic number, because the mean of its divisors is an integer number (2836675770).

Almost surely, 2^21211013147 is an apocalyptic number.

21211013147 is a deficient number, since it is larger than the sum of its proper divisors (1482393013).

21211013147 is a wasteful number, since it uses less digits than its factorization.

21211013147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18301213.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 21211013147 its reverse (74131011212), we get a palindrome (95342024359).

The spelling of 21211013147 in words is "twenty-one billion, two hundred eleven million, thirteen thousand, one hundred forty-seven".