211212092 has 48 divisors (see below), whose sum is σ = 460465152. Its totient is φ = 82537920.

The previous prime is 211212091. The next prime is 211212101. The reversal of 211212092 is 290212112.

It is a happy number.

211212092 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 2×211212092² = 89221095614032928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212091) 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, 26717 + ... + 33707.

It is an arithmetic number, because the mean of its divisors is an integer number (9593024).

Almost surely, 2^211212092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211212092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230232576).

211212092 is an abundant number, since it is smaller than the sum of its proper divisors (249253060).

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

211212092 is a wasteful number, since it uses less digits than its factorization.

211212092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7098 (or 7096 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 211212092 is about 14533.1377203961. The cubic root of 211212092 is about 595.5335862656.

Adding to 211212092 its sum of digits (20), we get a palindrome (211212112).

The spelling of 211212092 in words is "two hundred eleven million, two hundred twelve thousand, ninety-two".