40101021811 has 2 divisors, whose sum is σ = 40101021812. Its totient is φ = 40101021810.

The previous prime is 40101021791. The next prime is 40101021839. The reversal of 40101021811 is 11812010104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40101021811 - 2⁷ = 40101021683 is a prime.

It is not a weakly prime, because it can be changed into another prime (40101031811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20050510905 + 20050510906.

It is an arithmetic number, because the mean of its divisors is an integer number (20050510906).

Almost surely, 2^40101021811 is an apocalyptic number.

40101021811 is a deficient number, since it is larger than the sum of its proper divisors (1).

40101021811 is an equidigital number, since it uses as much as digits as its factorization.

40101021811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 40101021811 its reverse (11812010104), we get a palindrome (51913031915).

The spelling of 40101021811 in words is "forty billion, one hundred one million, twenty-one thousand, eight hundred eleven".