350215521454021 has 2 divisors, whose sum is σ = 350215521454022. Its totient is φ = 350215521454020.

The previous prime is 350215521454013. The next prime is 350215521454103. The reversal of 350215521454021 is 120454125512053.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205147612850625 + 145067908603396 = 14322975^2 + 12044414^2 .

It is a cyclic number.

It is not a de Polignac number, because 350215521454021 - 2³ = 350215521454013 is a prime.

It is a super-2 number, since 2×350215521454021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (350215521494021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175107760727010 + 175107760727011.

It is an arithmetic number, because the mean of its divisors is an integer number (175107760727011).

Almost surely, 2^{350215521454021} is an apocalyptic number.

It is an amenable number.

350215521454021 is a deficient number, since it is larger than the sum of its proper divisors (1).

350215521454021 is an equidigital number, since it uses as much as digits as its factorization.

350215521454021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240000, while the sum is 40.

Adding to 350215521454021 its reverse (120454125512053), we get a palindrome (470669646966074).

The spelling of 350215521454021 in words is "three hundred fifty trillion, two hundred fifteen billion, five hundred twenty-one million, four hundred fifty-four thousand, twenty-one".