11863215031021 has 2 divisors, whose sum is σ = 11863215031022. Its totient is φ = 11863215031020.

The previous prime is 11863215031013. The next prime is 11863215031069. The reversal of 11863215031021 is 12013051236811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11564175576996 + 299039454025 = 3400614^2 + 546845^2 .

It is a cyclic number.

It is not a de Polignac number, because 11863215031021 - 2³ = 11863215031013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11863215031001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5931607515510 + 5931607515511.

It is an arithmetic number, because the mean of its divisors is an integer number (5931607515511).

Almost surely, 2^{11863215031021} is an apocalyptic number.

It is an amenable number.

11863215031021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11863215031021 is an equidigital number, since it uses as much as digits as its factorization.

11863215031021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

Adding to 11863215031021 its reverse (12013051236811), we get a palindrome (23876266267832).

The spelling of 11863215031021 in words is "eleven trillion, eight hundred sixty-three billion, two hundred fifteen million, thirty-one thousand, twenty-one".