21151350213 has 8 divisors (see below), whose sum is σ = 32230628928. Its totient is φ = 12086485824.

The previous prime is 21151350203. The next prime is 21151350223. The reversal of 21151350213 is 31205315112.

It is an interprime number because it is at equal distance from previous prime (21151350203) and next prime (21151350223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21151350213 - 2¹⁴ = 21151333829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21151350203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503603556 + ... + 503603597.

It is an arithmetic number, because the mean of its divisors is an integer number (4028828616).

Almost surely, 2^21151350213 is an apocalyptic number.

It is an amenable number.

21151350213 is a deficient number, since it is larger than the sum of its proper divisors (11079278715).

21151350213 is a wasteful number, since it uses less digits than its factorization.

21151350213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007207163.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 21151350213 its reverse (31205315112), we get a palindrome (52356665325).

It can be divided in two parts, 211513 and 50213, that added together give a triangular number (261726 = T₇₂₃).

The spelling of 21151350213 in words is "twenty-one billion, one hundred fifty-one million, three hundred fifty thousand, two hundred thirteen".