21161002313146 has 8 divisors (see below), whose sum is σ = 32143294653120. Its totient is φ = 10446570762108.

The previous prime is 21161002313137. The next prime is 21161002313147. The reversal of 21161002313146 is 64131320016112.

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

It is not an unprimeable number, because it can be changed into a prime (21161002313147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66965197036 + ... + 66965197351.

It is an arithmetic number, because the mean of its divisors is an integer number (4017911831640).

Almost surely, 2^{21161002313146} is an apocalyptic number.

21161002313146 is a deficient number, since it is larger than the sum of its proper divisors (10982292339974).

21161002313146 is a wasteful number, since it uses less digits than its factorization.

21161002313146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133930394468.

The product of its (nonzero) digits is 5184, while the sum is 31.

Adding to 21161002313146 its reverse (64131320016112), we get a palindrome (85292322329258).

The spelling of 21161002313146 in words is "twenty-one trillion, one hundred sixty-one billion, two million, three hundred thirteen thousand, one hundred forty-six".