21214633641212 has 12 divisors (see below), whose sum is σ = 40500664224216. Its totient is φ = 9643015291440.

The previous prime is 21214633641211. The next prime is 21214633641241.

21214633641212 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214633641211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241075382243 + ... + 241075382330.

It is an arithmetic number, because the mean of its divisors is an integer number (3375055352018).

Almost surely, 2^{21214633641212} is an apocalyptic number.

21214633641212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21214633641212 is a deficient number, since it is larger than the sum of its proper divisors (19286030583004).

21214633641212 is a wasteful number, since it uses less digits than its factorization.

21214633641212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482150764588 (or 482150764586 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

It can be divided in two parts, 2121463 and 3641212, that added together give a palindrome (5762675).

The spelling of 21214633641212 in words is "twenty-one trillion, two hundred fourteen billion, six hundred thirty-three million, six hundred forty-one thousand, two hundred twelve".