121012841161 has 9 divisors (see below), whose sum is σ = 121615895989. Its totient is φ = 120412767136.

The previous prime is 121012841129. The next prime is 121012841167. The reversal of 121012841161 is 161148210121.

It is a happy number.

The square root of 121012841161 is 347869.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1283000761 + 119729840400 = 35819^2 + 346020^2 .

It is not a de Polignac number, because 121012841161 - 2⁵ = 121012841129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121012841167) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 81052731 + ... + 81054223.

Almost surely, 2^121012841161 is an apocalyptic number.

121012841161 is the 347869-th square number.

121012841161 is the 173935-th centered octagonal number.

It is an amenable number.

121012841161 is a deficient number, since it is larger than the sum of its proper divisors (603054828).

121012841161 is an frugal number, since it uses more digits than its factorization.

121012841161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452 (or 1726 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 28.

The spelling of 121012841161 in words is "one hundred twenty-one billion, twelve million, eight hundred forty-one thousand, one hundred sixty-one".