21214035651155 has 8 divisors (see below), whose sum is σ = 25457154302112. Its totient is φ = 16971020840448.

The previous prime is 21214035651103. The next prime is 21214035651217. The reversal of 21214035651155 is 55115653041212.

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

It is a cyclic number.

It is not a de Polignac number, because 21214035651155 - 2¹⁰ = 21214035650131 is a prime.

It is a Duffinian number.

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, 25509902 + ... + 26328371.

It is an arithmetic number, because the mean of its divisors is an integer number (3182144287764).

Almost surely, 2^{21214035651155} is an apocalyptic number.

21214035651155 is a deficient number, since it is larger than the sum of its proper divisors (4243118650957).

21214035651155 is an equidigital number, since it uses as much as digits as its factorization.

21214035651155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51920125.

The product of its (nonzero) digits is 180000, while the sum is 41.

Adding to 21214035651155 its reverse (55115653041212), we get a palindrome (76329688692367).

The spelling of 21214035651155 in words is "twenty-one trillion, two hundred fourteen billion, thirty-five million, six hundred fifty-one thousand, one hundred fifty-five".