21214026141631 has 2 divisors, whose sum is σ = 21214026141632. Its totient is φ = 21214026141630.

The previous prime is 21214026141619. The next prime is 21214026141701. The reversal of 21214026141631 is 13614162041212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21214026141631 - 2¹⁷ = 21214026010559 is a prime.

It is a super-2 number, since 2×21214026141631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214026141131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607013070815 + 10607013070816.

It is an arithmetic number, because the mean of its divisors is an integer number (10607013070816).

Almost surely, 2^{21214026141631} is an apocalyptic number.

21214026141631 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214026141631 is an equidigital number, since it uses as much as digits as its factorization.

21214026141631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

Adding to 21214026141631 its reverse (13614162041212), we get a palindrome (34828188182843).

The spelling of 21214026141631 in words is "twenty-one trillion, two hundred fourteen billion, twenty-six million, one hundred forty-one thousand, six hundred thirty-one".