161121010 has 32 divisors (see below), whose sum is σ = 295581312. Its totient is φ = 63221760.

The previous prime is 161120983. The next prime is 161121041. The reversal of 161121010 is 10121161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182029 + ... + 182911.

It is an arithmetic number, because the mean of its divisors is an integer number (9236916).

Almost surely, 2^161121010 is an apocalyptic number.

161121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161121010 is a deficient number, since it is larger than the sum of its proper divisors (134460302).

161121010 is a wasteful number, since it uses less digits than its factorization.

161121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 161121010 is about 12693.3451067873. The cubic root of 161121010 is about 544.1484442970.

Adding to 161121010 its reverse (10121161), we get a palindrome (171242171).

The spelling of 161121010 in words is "one hundred sixty-one million, one hundred twenty-one thousand, ten".