215042545114421 has 2 divisors, whose sum is σ = 215042545114422. Its totient is φ = 215042545114420.

The previous prime is 215042545114417. The next prime is 215042545114433. The reversal of 215042545114421 is 124411545240512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159295042833796 + 55747502280625 = 12621214^2 + 7466425^2 .

It is a cyclic number.

It is not a de Polignac number, because 215042545114421 - 2² = 215042545114417 is a prime.

It is a super-3 number, since 3×215042545114421³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215042545114451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107521272557210 + 107521272557211.

It is an arithmetic number, because the mean of its divisors is an integer number (107521272557211).

Almost surely, 2^{215042545114421} is an apocalyptic number.

It is an amenable number.

215042545114421 is a deficient number, since it is larger than the sum of its proper divisors (1).

215042545114421 is an equidigital number, since it uses as much as digits as its factorization.

215042545114421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256000, while the sum is 41.

The spelling of 215042545114421 in words is "two hundred fifteen trillion, forty-two billion, five hundred forty-five million, one hundred fourteen thousand, four hundred twenty-one".