161040312212 has 24 divisors (see below), whose sum is σ = 303533498016. Its totient is φ = 74317861728.

The previous prime is 161040312179. The next prime is 161040312217. The reversal of 161040312212 is 212213040161.

It is a super-3 number, since 3×161040312212³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161040312217) 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, 299003 + ... + 641469.

It is an arithmetic number, because the mean of its divisors is an integer number (12647229084).

Almost surely, 2^161040312212 is an apocalyptic number.

It is an amenable number.

161040312212 is a deficient number, since it is larger than the sum of its proper divisors (142493185804).

161040312212 is a wasteful number, since it uses less digits than its factorization.

161040312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351527 (or 351525 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 161040312212 its reverse (212213040161), we get a palindrome (373253352373).

The spelling of 161040312212 in words is "one hundred sixty-one billion, forty million, three hundred twelve thousand, two hundred twelve".