211221112412 has 12 divisors (see below), whose sum is σ = 369640257000. Its totient is φ = 105609610416.

The previous prime is 211221112397. The next prime is 211221112441. The reversal of 211221112412 is 214211122112.

It is a super-2 number, since 2×211221112412² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576923 + ... + 869069.

It is an arithmetic number, because the mean of its divisors is an integer number (30803354750).

Almost surely, 2^211221112412 is an apocalyptic number.

It is an amenable number.

211221112412 is a deficient number, since it is larger than the sum of its proper divisors (158419144588).

211221112412 is a wasteful number, since it uses less digits than its factorization.

211221112412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472900 (or 472898 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 211221112412 its reverse (214211122112), we get a palindrome (425432234524).

The spelling of 211221112412 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand, four hundred twelve".