212210011209 has 32 divisors (see below), whose sum is σ = 332810634240. Its totient is φ = 117771268032.

The previous prime is 212210011201. The next prime is 212210011219. The reversal of 212210011209 is 902110012212.

It is not a de Polignac number, because 212210011209 - 2³ = 212210011201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (212210011201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 928942 + ... + 1134615.

It is an arithmetic number, because the mean of its divisors is an integer number (10400332320).

Almost surely, 2^212210011209 is an apocalyptic number.

It is an amenable number.

212210011209 is a deficient number, since it is larger than the sum of its proper divisors (120600623031).

212210011209 is a wasteful number, since it uses less digits than its factorization.

212210011209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063709.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 212210011209 in words is "two hundred twelve billion, two hundred ten million, eleven thousand, two hundred nine".