10401642821 has 2 divisors, whose sum is σ = 10401642822. Its totient is φ = 10401642820.

The previous prime is 10401642731. The next prime is 10401642841. The reversal of 10401642821 is 12824610401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5347996900 + 5053645921 = 73130^2 + 71089^2 .

It is an emirp because it is prime and its reverse (12824610401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10401642821 - 2³⁰ = 9327900997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10401642841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5200821410 + 5200821411.

It is an arithmetic number, because the mean of its divisors is an integer number (5200821411).

Almost surely, 2^10401642821 is an apocalyptic number.

It is an amenable number.

10401642821 is a deficient number, since it is larger than the sum of its proper divisors (1).

10401642821 is an equidigital number, since it uses as much as digits as its factorization.

10401642821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The spelling of 10401642821 in words is "ten billion, four hundred one million, six hundred forty-two thousand, eight hundred twenty-one".