21012201214 has 8 divisors (see below), whose sum is σ = 31537774440. Its totient is φ = 10499609736.

The previous prime is 21012201211. The next prime is 21012201271. The reversal of 21012201214 is 41210221012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012201211) 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, 3241389 + ... + 3247864.

It is an arithmetic number, because the mean of its divisors is an integer number (3942221805).

Almost surely, 2^21012201214 is an apocalyptic number.

21012201214 is a deficient number, since it is larger than the sum of its proper divisors (10525573226).

21012201214 is a wasteful number, since it uses less digits than its factorization.

21012201214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490874.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012201214 its reverse (41210221012), we get a palindrome (62222422226).

The spelling of 21012201214 in words is "twenty-one billion, twelve million, two hundred one thousand, two hundred fourteen".