34402421221 has 24 divisors (see below), whose sum is σ = 40174712640. Its totient is φ = 29373422400.

The previous prime is 34402421173. The next prime is 34402421227. The reversal of 34402421221 is 12212420443.

It is not a de Polignac number, because 34402421221 - 2¹⁷ = 34402290149 is a prime.

It is a super-2 number, since 2×34402421221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34402421227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18307960 + ... + 18309838.

It is an arithmetic number, because the mean of its divisors is an integer number (1673946360).

Almost surely, 2^34402421221 is an apocalyptic number.

It is an amenable number.

34402421221 is a deficient number, since it is larger than the sum of its proper divisors (5772291419).

34402421221 is a wasteful number, since it uses less digits than its factorization.

34402421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145 (or 3138 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 34402421221 its reverse (12212420443), we get a palindrome (46614841664).

The spelling of 34402421221 in words is "thirty-four billion, four hundred two million, four hundred twenty-one thousand, two hundred twenty-one".