21013202151 has 12 divisors (see below), whose sum is σ = 30353934520. Its totient is φ = 14008094640.

The previous prime is 21013202131. The next prime is 21013202153. The reversal of 21013202151 is 15120231012.

It is not a de Polignac number, because 21013202151 - 2¹³ = 21013193959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013202153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180681 + ... + 273261.

Almost surely, 2^21013202151 is an apocalyptic number.

21013202151 is a deficient number, since it is larger than the sum of its proper divisors (9340732369).

21013202151 is a wasteful number, since it uses less digits than its factorization.

21013202151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117806 (or 117803 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 21013202151 its reverse (15120231012), we get a palindrome (36133433163).

The spelling of 21013202151 in words is "twenty-one billion, thirteen million, two hundred two thousand, one hundred fifty-one".