401124043921 has 2 divisors, whose sum is σ = 401124043922. Its totient is φ = 401124043920.

The previous prime is 401124043919. The next prime is 401124043937. The reversal of 401124043921 is 129340421104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240919978896 + 160204065025 = 490836^2 + 400255^2 .

It is a cyclic number.

It is not a de Polignac number, because 401124043921 - 2¹ = 401124043919 is a prime.

It is a super-2 number, since 2×401124043921² (a number of 24 digits) contains 22 as substring.

Together with 401124043919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (401124043321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200562021960 + 200562021961.

It is an arithmetic number, because the mean of its divisors is an integer number (200562021961).

Almost surely, 2^401124043921 is an apocalyptic number.

It is an amenable number.

401124043921 is a deficient number, since it is larger than the sum of its proper divisors (1).

401124043921 is an equidigital number, since it uses as much as digits as its factorization.

401124043921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 401124043921 in words is "four hundred one billion, one hundred twenty-four million, forty-three thousand, nine hundred twenty-one".