211201022122121 has 8 divisors (see below), whose sum is σ = 211723554969600. Its totient is φ = 210678519270240.

The previous prime is 211201022122093. The next prime is 211201022122169. The reversal of 211201022122121 is 121221220102112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211201022122121 - 2⁴² = 206802975611017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211201022122093 and 211201022122102.

It is not an unprimeable number, because it can be changed into a prime (211201022122171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6633560 + ... + 21596438.

It is an arithmetic number, because the mean of its divisors is an integer number (26465444371200).

Almost surely, 2^{211201022122121} is an apocalyptic number.

It is an amenable number.

211201022122121 is a deficient number, since it is larger than the sum of its proper divisors (522532847479).

211201022122121 is a wasteful number, since it uses less digits than its factorization.

211201022122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14997799.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211201022122121 its reverse (121221220102112), we get a palindrome (332422242224233).

The spelling of 211201022122121 in words is "two hundred eleven trillion, two hundred one billion, twenty-two million, one hundred twenty-two thousand, one hundred twenty-one".