3405212351021 has 12 divisors (see below), whose sum is σ = 3777235125300. Its totient is φ = 3066607739520.

The previous prime is 3405212351017. The next prime is 3405212351027. The reversal of 3405212351021 is 1201532125043.

It can be written as a sum of positive squares in 6 ways, for example, as 2104780017796 + 1300432333225 = 1450786^2 + 1140365^2 .

It is not a de Polignac number, because 3405212351021 - 2² = 3405212351017 is a prime.

It is a super-2 number, since 2×3405212351021² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3405212351027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245714846 + ... + 245728703.

It is an arithmetic number, because the mean of its divisors is an integer number (314769593775).

Almost surely, 2^{3405212351021} is an apocalyptic number.

It is an amenable number.

3405212351021 is a deficient number, since it is larger than the sum of its proper divisors (372022774279).

3405212351021 is a wasteful number, since it uses less digits than its factorization.

3405212351021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491443616 (or 491443603 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 3405212351021 its reverse (1201532125043), we get a palindrome (4606744476064).

The spelling of 3405212351021 in words is "three trillion, four hundred five billion, two hundred twelve million, three hundred fifty-one thousand, twenty-one".