221260117487 has 2 divisors, whose sum is σ = 221260117488. Its totient is φ = 221260117486.

The previous prime is 221260117469. The next prime is 221260117489. The reversal of 221260117487 is 784711062122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221260117487 - 2¹⁴ = 221260101103 is a prime.

It is a super-2 number, since 2×221260117487² (a number of 23 digits) contains 22 as substring.

Together with 221260117489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221260117489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110630058743 + 110630058744.

It is an arithmetic number, because the mean of its divisors is an integer number (110630058744).

Almost surely, 2^221260117487 is an apocalyptic number.

221260117487 is a deficient number, since it is larger than the sum of its proper divisors (1).

221260117487 is an equidigital number, since it uses as much as digits as its factorization.

221260117487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 221260117487 in words is "two hundred twenty-one billion, two hundred sixty million, one hundred seventeen thousand, four hundred eighty-seven".