211221143012 has 24 divisors (see below), whose sum is σ = 403514614272. Its totient is φ = 95944312800.

The previous prime is 211221142999. The next prime is 211221143033. The reversal of 211221143012 is 210341122112.

It is a super-3 number, since 3×211221143012³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1566983 + ... + 1696430.

It is an arithmetic number, because the mean of its divisors is an integer number (16813108928).

Almost surely, 2^211221143012 is an apocalyptic number.

211221143012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

211221143012 is a deficient number, since it is larger than the sum of its proper divisors (192293471260).

211221143012 is a wasteful number, since it uses less digits than its factorization.

211221143012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264899 (or 3264897 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 211221143012 its reverse (210341122112), we get a palindrome (421562265124).

The spelling of 211221143012 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred forty-three thousand, twelve".