20401401021013 has 2 divisors, whose sum is σ = 20401401021014. Its totient is φ = 20401401021012.

The previous prime is 20401401020993. The next prime is 20401401021047. The reversal of 20401401021013 is 31012010410402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17780036023044 + 2621364997969 = 4216638^2 + 1619063^2 .

It is a cyclic number.

It is not a de Polignac number, because 20401401021013 - 2⁹ = 20401401020501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20401401024013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200700510506 + 10200700510507.

It is an arithmetic number, because the mean of its divisors is an integer number (10200700510507).

Almost surely, 2^{20401401021013} is an apocalyptic number.

It is an amenable number.

20401401021013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401401021013 is an equidigital number, since it uses as much as digits as its factorization.

20401401021013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20401401021013 its reverse (31012010410402), we get a palindrome (51413411431415).

The spelling of 20401401021013 in words is "twenty trillion, four hundred one billion, four hundred one million, twenty-one thousand, thirteen".