211121010120001 has 4 divisors (see below), whose sum is σ = 222232642231600. Its totient is φ = 200009378008404.

The previous prime is 211121010119959. The next prime is 211121010120011. The reversal of 211121010120001 is 100021010121112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211121010120001 - 2¹⁵ = 211121010087233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121010120011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555816055771 + ... + 5555816055808.

It is an arithmetic number, because the mean of its divisors is an integer number (55558160557900).

Almost surely, 2^{211121010120001} is an apocalyptic number.

It is an amenable number.

211121010120001 is a deficient number, since it is larger than the sum of its proper divisors (11111632111599).

211121010120001 is a wasteful number, since it uses less digits than its factorization.

211121010120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111632111598.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211121010120001 its reverse (100021010121112), we get a palindrome (311142020241113).

The spelling of 211121010120001 in words is "two hundred eleven trillion, one hundred twenty-one billion, ten million, one hundred twenty thousand, one".