21120001214 has 16 divisors (see below), whose sum is σ = 34190000208. Its totient is φ = 9726814272.

The previous prime is 21120001207. The next prime is 21120001219. The reversal of 21120001214 is 41210002112.

It is a happy number.

It is a super-2 number, since 2×21120001214² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120001219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857567 + ... + 881850.

It is an arithmetic number, because the mean of its divisors is an integer number (2136875013).

Almost surely, 2^21120001214 is an apocalyptic number.

21120001214 is a deficient number, since it is larger than the sum of its proper divisors (13069998994).

21120001214 is a wasteful number, since it uses less digits than its factorization.

21120001214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739899.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21120001214 its reverse (41210002112), we get a palindrome (62330003326).

The spelling of 21120001214 in words is "twenty-one billion, one hundred twenty million, one thousand, two hundred fourteen".