349020221021 has 4 divisors (see below), whose sum is σ = 349023481632. Its totient is φ = 349016960412.

The previous prime is 349020220979. The next prime is 349020221041. The reversal of 349020221021 is 120122020943.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 349020221021 - 2³⁰ = 347946479197 is a prime.

It is a super-2 number, since 2×349020221021² (a number of 24 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 (349020221041) 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, 1464095 + ... + 1685708.

It is an arithmetic number, because the mean of its divisors is an integer number (87255870408).

Almost surely, 2^349020221021 is an apocalyptic number.

It is an amenable number.

349020221021 is a deficient number, since it is larger than the sum of its proper divisors (3260611).

349020221021 is a wasteful number, since it uses less digits than its factorization.

349020221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260610.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 349020221021 its reverse (120122020943), we get a palindrome (469142241964).

The spelling of 349020221021 in words is "three hundred forty-nine billion, twenty million, two hundred twenty-one thousand, twenty-one".