161331001002311 has 32 divisors (see below), whose sum is σ = 192551637801600. Its totient is φ = 132287978833920.

The previous prime is 161331001002253. The next prime is 161331001002329. The reversal of 161331001002311 is 113200100133161.

It is not a de Polignac number, because 161331001002311 - 2⁴² = 156932954491207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161331001002341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22892555 + ... + 29098643.

It is an arithmetic number, because the mean of its divisors is an integer number (6017238681300).

Almost surely, 2^{161331001002311} is an apocalyptic number.

161331001002311 is a deficient number, since it is larger than the sum of its proper divisors (31220636799289).

161331001002311 is a wasteful number, since it uses less digits than its factorization.

161331001002311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207899.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 161331001002311 its reverse (113200100133161), we get a palindrome (274531101135472).

The spelling of 161331001002311 in words is "one hundred sixty-one trillion, three hundred thirty-one billion, one million, two thousand, three hundred eleven".