10211212209 has 16 divisors (see below), whose sum is σ = 14854633920. Its totient is φ = 6187796160.

The previous prime is 10211212189. The next prime is 10211212217. The reversal of 10211212209 is 90221211201.

It is not a de Polignac number, because 10211212209 - 2⁹ = 10211211697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10211212289) 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, 315807 + ... + 346635.

It is an arithmetic number, because the mean of its divisors is an integer number (928414620).

Almost surely, 2^10211212209 is an apocalyptic number.

It is an amenable number.

10211212209 is a deficient number, since it is larger than the sum of its proper divisors (4643421711).

10211212209 is a wasteful number, since it uses less digits than its factorization.

10211212209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40880.

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

The spelling of 10211212209 in words is "ten billion, two hundred eleven million, two hundred twelve thousand, two hundred nine".