21513451002211 has 16 divisors (see below), whose sum is σ = 24599395814400. Its totient is φ = 18430656622560.

The previous prime is 21513451002193. The next prime is 21513451002233. The reversal of 21513451002211 is 11220015431512.

It is not a de Polignac number, because 21513451002211 - 2¹³ = 21513450994019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21513451002211.

It is not an unprimeable number, because it can be changed into a prime (21513451006211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158502906 + ... + 158638576.

It is an arithmetic number, because the mean of its divisors is an integer number (1537462238400).

Almost surely, 2^{21513451002211} is an apocalyptic number.

21513451002211 is a deficient number, since it is larger than the sum of its proper divisors (3085944812189).

21513451002211 is a wasteful number, since it uses less digits than its factorization.

21513451002211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147114.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 21513451002211 its reverse (11220015431512), we get a palindrome (32733466433723).

The spelling of 21513451002211 in words is "twenty-one trillion, five hundred thirteen billion, four hundred fifty-one million, two thousand, two hundred eleven".