354212917621 has 2 divisors, whose sum is σ = 354212917622. Its totient is φ = 354212917620.

The previous prime is 354212917577. The next prime is 354212917657. The reversal of 354212917621 is 126719212453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350760062500 + 3452855121 = 592250^2 + 58761^2 .

It is an emirp because it is prime and its reverse (126719212453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 354212917621 - 2²⁵ = 354179363189 is a prime.

It is a super-3 number, since 3×354212917621³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354212912621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177106458810 + 177106458811.

It is an arithmetic number, because the mean of its divisors is an integer number (177106458811).

Almost surely, 2^354212917621 is an apocalyptic number.

It is an amenable number.

354212917621 is a deficient number, since it is larger than the sum of its proper divisors (1).

354212917621 is an equidigital number, since it uses as much as digits as its factorization.

354212917621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The spelling of 354212917621 in words is "three hundred fifty-four billion, two hundred twelve million, nine hundred seventeen thousand, six hundred twenty-one".