402211213421 has 8 divisors (see below), whose sum is σ = 405983466144. Its totient is φ = 398439206640.

The previous prime is 402211213399. The next prime is 402211213429. The reversal of 402211213421 is 124312112204.

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 402211213421 - 2¹⁸ = 402210951277 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 (402211213429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6127451 + ... + 6192743.

It is an arithmetic number, because the mean of its divisors is an integer number (50747933268).

Almost surely, 2^402211213421 is an apocalyptic number.

It is an amenable number.

402211213421 is a deficient number, since it is larger than the sum of its proper divisors (3772252723).

402211213421 is a wasteful number, since it uses less digits than its factorization.

402211213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122971.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 402211213421 its reverse (124312112204), we get a palindrome (526523325625).

The spelling of 402211213421 in words is "four hundred two billion, two hundred eleven million, two hundred thirteen thousand, four hundred twenty-one".