21214030044651 has 4 divisors (see below), whose sum is σ = 28285373392872. Its totient is φ = 14142686696432.

The previous prime is 21214030044611. The next prime is 21214030044661. The reversal of 21214030044651 is 15644003041212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21214030044651 - 2⁷ = 21214030044523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21214030044611) 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, 3535671674106 + ... + 3535671674111.

It is an arithmetic number, because the mean of its divisors is an integer number (7071343348218).

Almost surely, 2^{21214030044651} is an apocalyptic number.

21214030044651 is a deficient number, since it is larger than the sum of its proper divisors (7071343348221).

21214030044651 is an equidigital number, since it uses as much as digits as its factorization.

21214030044651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071343348220.

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 21214030044651 its reverse (15644003041212), we get a palindrome (36858033085863).

The spelling of 21214030044651 in words is "twenty-one trillion, two hundred fourteen billion, thirty million, forty-four thousand, six hundred fifty-one".