21224546413487 has 2 divisors, whose sum is σ = 21224546413488. Its totient is φ = 21224546413486.

The previous prime is 21224546413429. The next prime is 21224546413493. The reversal of 21224546413487 is 78431464542212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21224546413487 - 2²² = 21224542219183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21224546413087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612273206743 + 10612273206744.

It is an arithmetic number, because the mean of its divisors is an integer number (10612273206744).

Almost surely, 2^{21224546413487} is an apocalyptic number.

21224546413487 is a deficient number, since it is larger than the sum of its proper divisors (1).

21224546413487 is an equidigital number, since it uses as much as digits as its factorization.

21224546413487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10321920, while the sum is 53.

The spelling of 21224546413487 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred forty-six million, four hundred thirteen thousand, four hundred eighty-seven".