211121212211001 has 32 divisors (see below), whose sum is σ = 316306425945600. Its totient is φ = 139157257599360.

The previous prime is 211121212210973. The next prime is 211121212211047. The reversal of 211121212211001 is 100112212121112.

It is a happy number.

211121212211001 is a `hidden beast` number, since 211 + 12 + 121 + 221 + 100 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-211121212211001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211121212211501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35411391 + ... + 40941531.

It is an arithmetic number, because the mean of its divisors is an integer number (9884575810800).

Almost surely, 2^{211121212211001} is an apocalyptic number.

It is an amenable number.

211121212211001 is a deficient number, since it is larger than the sum of its proper divisors (105185213734599).

211121212211001 is a wasteful number, since it uses less digits than its factorization.

211121212211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546126 (or 5546120 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211121212211001 its reverse (100112212121112), we get a palindrome (311233424332113).

The spelling of 211121212211001 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twelve million, two hundred eleven thousand, one".