349102121021 has 4 divisors (see below), whose sum is σ = 349108089372. Its totient is φ = 349096152672.

The previous prime is 349102121009. The next prime is 349102121111. The reversal of 349102121021 is 120121201943.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24189580900 + 324912540121 = 155530^2 + 570011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349102121021 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 (349102111021) 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, 2895560 + ... + 3013713.

It is an arithmetic number, because the mean of its divisors is an integer number (87277022343).

Almost surely, 2^349102121021 is an apocalyptic number.

It is an amenable number.

349102121021 is a deficient number, since it is larger than the sum of its proper divisors (5968351).

349102121021 is an equidigital number, since it uses as much as digits as its factorization.

349102121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968350.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 349102121021 its reverse (120121201943), we get a palindrome (469223322964).

The spelling of 349102121021 in words is "three hundred forty-nine billion, one hundred two million, one hundred twenty-one thousand, twenty-one".