211002212121 has 16 divisors (see below), whose sum is σ = 292990824000. Its totient is φ = 134905980608.

The previous prime is 211002212111. The next prime is 211002212123. The reversal of 211002212121 is 121212200112.

It is a cyclic number.

It is not a de Polignac number, because 211002212121 - 2¹⁰ = 211002211097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211002212121.

It is not an unprimeable number, because it can be changed into a prime (211002212123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8125671 + ... + 8151596.

It is an arithmetic number, because the mean of its divisors is an integer number (18311926500).

Almost surely, 2^211002212121 is an apocalyptic number.

It is an amenable number.

211002212121 is a deficient number, since it is larger than the sum of its proper divisors (81988611879).

211002212121 is a wasteful number, since it uses less digits than its factorization.

211002212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16277448.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211002212121 its reverse (121212200112), we get a palindrome (332214412233).

The spelling of 211002212121 in words is "two hundred eleven billion, two million, two hundred twelve thousand, one hundred twenty-one".