161034221401 has 16 divisors (see below), whose sum is σ = 169865538048. Its totient is φ = 152363411200.

The previous prime is 161034221389. The next prime is 161034221443. The reversal of 161034221401 is 104122430161.

It is a cyclic number.

It is not a de Polignac number, because 161034221401 - 2⁷ = 161034221273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161034291401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794496 + ... + 976366.

It is an arithmetic number, because the mean of its divisors is an integer number (10616596128).

Almost surely, 2^161034221401 is an apocalyptic number.

It is an amenable number.

161034221401 is a deficient number, since it is larger than the sum of its proper divisors (8831316647).

161034221401 is a wasteful number, since it uses less digits than its factorization.

161034221401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182312.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 161034221401 its reverse (104122430161), we get a palindrome (265156651562).

The spelling of 161034221401 in words is "one hundred sixty-one billion, thirty-four million, two hundred twenty-one thousand, four hundred one".