221131441249 has 2 divisors, whose sum is σ = 221131441250. Its totient is φ = 221131441248.

The previous prime is 221131441189. The next prime is 221131441273. The reversal of 221131441249 is 942144131122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140020401249 + 81111040000 = 374193^2 + 284800^2 .

It is a cyclic number.

It is not a de Polignac number, because 221131441249 - 2¹³ = 221131433057 is a prime.

It is a super-2 number, since 2×221131441249² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221131441849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110565720624 + 110565720625.

It is an arithmetic number, because the mean of its divisors is an integer number (110565720625).

Almost surely, 2^221131441249 is an apocalyptic number.

It is an amenable number.

221131441249 is a deficient number, since it is larger than the sum of its proper divisors (1).

221131441249 is an equidigital number, since it uses as much as digits as its factorization.

221131441249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The spelling of 221131441249 in words is "two hundred twenty-one billion, one hundred thirty-one million, four hundred forty-one thousand, two hundred forty-nine".