21012201231203 has 32 divisors (see below), whose sum is σ = 26258130662400. Its totient is φ = 16371653302656.

The previous prime is 21012201231167. The next prime is 21012201231239. The reversal of 21012201231203 is 30213210221012.

It is an interprime number because it is at equal distance from previous prime (21012201231167) and next prime (21012201231239).

It is a cyclic number.

It is not a de Polignac number, because 21012201231203 - 2²⁸ = 21011932795747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012201231503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4584188 + ... + 7939721.

It is an arithmetic number, because the mean of its divisors is an integer number (820566583200).

Almost surely, 2^{21012201231203} is an apocalyptic number.

21012201231203 is a deficient number, since it is larger than the sum of its proper divisors (5245929431197).

21012201231203 is a wasteful number, since it uses less digits than its factorization.

21012201231203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12524211.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21012201231203 its reverse (30213210221012), we get a palindrome (51225411452215).

The spelling of 21012201231203 in words is "twenty-one trillion, twelve billion, two hundred one million, two hundred thirty-one thousand, two hundred three".