211215512112 has 160 divisors (see below), whose sum is σ = 603896705280. Its totient is φ = 63080693760.

The previous prime is 211215512099. The next prime is 211215512129.

211215512112 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×211215512112² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10669968 + ... + 10689744.

It is an arithmetic number, because the mean of its divisors is an integer number (3774354408).

Almost surely, 2^211215512112 is an apocalyptic number.

211215512112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211215512112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301948352640).

211215512112 is an abundant number, since it is smaller than the sum of its proper divisors (392681193168).

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

211215512112 is a wasteful number, since it uses less digits than its factorization.

211215512112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20091 (or 20085 counting only the distinct ones).

The product of its digits is 400, while the sum is 24.

It can be divided in two parts, 211215 and 512112, that added together give a palindrome (723327).

The spelling of 211215512112 in words is "two hundred eleven billion, two hundred fifteen million, five hundred twelve thousand, one hundred twelve".