121012100222121 has 6 divisors (see below), whose sum is σ = 174795255876410. Its totient is φ = 80674733481408.

The previous prime is 121012100221997. The next prime is 121012100222129. The reversal of 121012100222121 is 121222001210121.

121012100222121 is a `hidden beast` number, since 1 + 210 + 1 + 210 + 0 + 2 + 221 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 117999098582121 + 3013001640000 = 10862739^2 + 1735800^2 .

It is not a de Polignac number, because 121012100222121 - 2¹³ = 121012100213929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012100222094 and 121012100222103.

It is not an unprimeable number, because it can be changed into a prime (121012100222129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6722894456776 + ... + 6722894456793.

Almost surely, 2^{121012100222121} is an apocalyptic number.

It is an amenable number.

121012100222121 is a deficient number, since it is larger than the sum of its proper divisors (53783155654289).

121012100222121 is a wasteful number, since it uses less digits than its factorization.

121012100222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13445788913575 (or 13445788913572 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121012100222121 its reverse (121222001210121), we get a palindrome (242234101432242).

The spelling of 121012100222121 in words is "one hundred twenty-one trillion, twelve billion, one hundred million, two hundred twenty-two thousand, one hundred twenty-one".