4221401239997 has 2 divisors, whose sum is σ = 4221401239998. Its totient is φ = 4221401239996.

The previous prime is 4221401239963. The next prime is 4221401240033. The reversal of 4221401239997 is 7999321041224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3156399943876 + 1065001296121 = 1776626^2 + 1031989^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221401239997 - 2¹² = 4221401235901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221401239397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110700619998 + 2110700619999.

It is an arithmetic number, because the mean of its divisors is an integer number (2110700619999).

Almost surely, 2^{4221401239997} is an apocalyptic number.

It is an amenable number.

4221401239997 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221401239997 is an equidigital number, since it uses as much as digits as its factorization.

4221401239997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 4221401239997 in words is "four trillion, two hundred twenty-one billion, four hundred one million, two hundred thirty-nine thousand, nine hundred ninety-seven".