21603156051115 has 4 divisors (see below), whose sum is σ = 25923787261344. Its totient is φ = 17282524840888.

The previous prime is 21603156051091. The next prime is 21603156051149. The reversal of 21603156051115 is 51115065130612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21603156051115 - 2⁵ = 21603156051083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2160315605107 + ... + 2160315605116.

It is an arithmetic number, because the mean of its divisors is an integer number (6480946815336).

Almost surely, 2^{21603156051115} is an apocalyptic number.

21603156051115 is a deficient number, since it is larger than the sum of its proper divisors (4320631210229).

21603156051115 is an equidigital number, since it uses as much as digits as its factorization.

21603156051115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320631210228.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 21603156051115 in words is "twenty-one trillion, six hundred three billion, one hundred fifty-six million, fifty-one thousand, one hundred fifteen".