42221553401 has 2 divisors, whose sum is σ = 42221553402. Its totient is φ = 42221553400.

The previous prime is 42221553329. The next prime is 42221553419. The reversal of 42221553401 is 10435512224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26325387001 + 15896166400 = 162251^2 + 126080^2 .

It is a cyclic number.

It is not a de Polignac number, because 42221553401 - 2¹⁰ = 42221552377 is a prime.

It is not a weakly prime, because it can be changed into another prime (42221550401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21110776700 + 21110776701.

It is an arithmetic number, because the mean of its divisors is an integer number (21110776701).

Almost surely, 2^42221553401 is an apocalyptic number.

It is an amenable number.

42221553401 is a deficient number, since it is larger than the sum of its proper divisors (1).

42221553401 is an equidigital number, since it uses as much as digits as its factorization.

42221553401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 42221553401 in words is "forty-two billion, two hundred twenty-one million, five hundred fifty-three thousand, four hundred one".