58121221 has 2 divisors, whose sum is σ = 58121222. Its totient is φ = 58121220.

The previous prime is 58121201. The next prime is 58121237. The reversal of 58121221 is 12212185.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57972996 + 148225 = 7614^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 58121221 - 2⁹ = 58120709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 58121192 and 58121201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (58121201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29060610 + 29060611.

It is an arithmetic number, because the mean of its divisors is an integer number (29060611).

Almost surely, 2^58121221 is an apocalyptic number.

It is an amenable number.

58121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

58121221 is an equidigital number, since it uses as much as digits as its factorization.

58121221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 22.

The square root of 58121221 is about 7623.7275003767. The cubic root of 58121221 is about 387.3571497039.

The spelling of 58121221 in words is "fifty-eight million, one hundred twenty-one thousand, two hundred twenty-one".