21414312021421 has 12 divisors (see below), whose sum is σ = 24776889944800. Its totient is φ = 18442948150440.

The previous prime is 21414312021409. The next prime is 21414312021433. The reversal of 21414312021421 is 12412021341412.

It is an interprime number because it is at equal distance from previous prime (21414312021409) and next prime (21414312021433).

It is not a de Polignac number, because 21414312021421 - 2²⁵ = 21414278466989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21414312021421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414312021461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4657307841 + ... + 4657312438.

Almost surely, 2^{21414312021421} is an apocalyptic number.

It is an amenable number.

21414312021421 is a deficient number, since it is larger than the sum of its proper divisors (3362577923379).

21414312021421 is a wasteful number, since it uses less digits than its factorization.

21414312021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9314620320 (or 9314620309 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 21414312021421 its reverse (12412021341412), we get a palindrome (33826333362833).

The spelling of 21414312021421 in words is "twenty-one trillion, four hundred fourteen billion, three hundred twelve million, twenty-one thousand, four hundred twenty-one".