211211212422 has 64 divisors (see below), whose sum is σ = 519830576640. Its totient is φ = 55833632256.

The previous prime is 211211212411. The next prime is 211211212493. The reversal of 211211212422 is 224212112112.

It is a super-2 number, since 2×211211212422² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

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, 2464773 + ... + 2549024.

It is an arithmetic number, because the mean of its divisors is an integer number (8122352760).

Almost surely, 2^211211212422 is an apocalyptic number.

211211212422 is an abundant number, since it is smaller than the sum of its proper divisors (308619364218).

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

211211212422 is a wasteful number, since it uses less digits than its factorization.

211211212422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013885.

The product of its digits is 256, while the sum is 21.

Adding to 211211212422 its reverse (224212112112), we get a palindrome (435423324534).

The spelling of 211211212422 in words is "two hundred eleven billion, two hundred eleven million, two hundred twelve thousand, four hundred twenty-two".