2121211122201 has 6 divisors (see below), whose sum is σ = 3063971620970. Its totient is φ = 1414140748128.

The previous prime is 2121211122193. The next prime is 2121211122211. The reversal of 2121211122201 is 1022211121212.

2121211122201 is a `hidden beast` number, since 212 + 121 + 112 + 220 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1228373222400 + 892837899801 = 1108320^2 + 944901^2 .

It is not a de Polignac number, because 2121211122201 - 2³ = 2121211122193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121211122211) 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, 117845062336 + ... + 117845062353.

Almost surely, 2^{2121211122201} is an apocalyptic number.

It is an amenable number.

2121211122201 is a deficient number, since it is larger than the sum of its proper divisors (942760498769).

2121211122201 is a wasteful number, since it uses less digits than its factorization.

2121211122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235690124695 (or 235690124692 counting only the distinct ones).

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

Adding to 2121211122201 its reverse (1022211121212), we get a palindrome (3143422243413).

The spelling of 2121211122201 in words is "two trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred one".