21214036421239 has 4 divisors (see below), whose sum is σ = 22461920916624. Its totient is φ = 19966151925856.

The previous prime is 21214036421203. The next prime is 21214036421317. The reversal of 21214036421239 is 93212463041212.

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 21214036421239 - 2⁷ = 21214036421111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214036421839) 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, 623942247667 + ... + 623942247700.

It is an arithmetic number, because the mean of its divisors is an integer number (5615480229156).

Almost surely, 2^{21214036421239} is an apocalyptic number.

21214036421239 is a deficient number, since it is larger than the sum of its proper divisors (1247884495385).

21214036421239 is a wasteful number, since it uses less digits than its factorization.

21214036421239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247884495384.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 21214036421239 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, four hundred twenty-one thousand, two hundred thirty-nine".