211121213310 has 72 divisors (see below), whose sum is σ = 638533968696. Its totient is φ = 48256276320.

The previous prime is 211121213299. The next prime is 211121213341. The reversal of 211121213310 is 13312121112.

211121213310 is a `hidden beast` number, since 21 + 1 + 121 + 213 + 310 = 666.

211121213310 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211121213310² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23932236 + ... + 23941055.

It is an arithmetic number, because the mean of its divisors is an integer number (8868527343).

Almost surely, 2^211121213310 is an apocalyptic number.

211121213310 is an abundant number, since it is smaller than the sum of its proper divisors (427412755386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211121213310 is a wasteful number, since it uses less digits than its factorization.

211121213310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47873318 (or 47873308 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 211121213310 its reverse (13312121112), we get a palindrome (224433334422).

The spelling of 211121213310 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred thirteen thousand, three hundred ten".