1211322122001 has 12 divisors (see below), whose sum is σ = 1790377917328. Its totient is φ = 788767893144.

The previous prime is 1211322121993. The next prime is 1211322122011. The reversal of 1211322122001 is 1002212231121.

1211322122001 is a `hidden beast` number, since 121 + 1 + 322 + 1 + 220 + 0 + 1 = 666.

It is not a de Polignac number, because 1211322122001 - 2³ = 1211322121993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211322122011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1565015275 + ... + 1565016048.

Almost surely, 2^{1211322122001} is an apocalyptic number.

It is an amenable number.

1211322122001 is a deficient number, since it is larger than the sum of its proper divisors (579055795327).

1211322122001 is a wasteful number, since it uses less digits than its factorization.

1211322122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130031372 (or 3130031369 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1211322122001 its reverse (1002212231121), we get a palindrome (2213534353122).

The spelling of 1211322122001 in words is "one trillion, two hundred eleven billion, three hundred twenty-two million, one hundred twenty-two thousand, one".