212021210311 has 16 divisors (see below), whose sum is σ = 230450918400. Its totient is φ = 194322585600.

The previous prime is 212021210309. The next prime is 212021210329. The reversal of 212021210311 is 113012120212.

It is a cyclic number.

It is not a de Polignac number, because 212021210311 - 2¹ = 212021210309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021214311) 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, 1906716 + ... + 2014846.

It is an arithmetic number, because the mean of its divisors is an integer number (14403182400).

Almost surely, 2^212021210311 is an apocalyptic number.

212021210311 is a deficient number, since it is larger than the sum of its proper divisors (18429708089).

212021210311 is a wasteful number, since it uses less digits than its factorization.

212021210311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111510.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 212021210311 its reverse (113012120212), we get a palindrome (325033330523).

Subtracting from 212021210311 its reverse (113012120212), we obtain a palindrome (99009090099).

The spelling of 212021210311 in words is "two hundred twelve billion, twenty-one million, two hundred ten thousand, three hundred eleven".