21234101552 has 10 divisors (see below), whose sum is σ = 41141071788. Its totient is φ = 10617050768.

The previous prime is 21234101489. The next prime is 21234101591. The reversal of 21234101552 is 25510143212.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 663565658 + ... + 663565689.

Almost surely, 2^21234101552 is an apocalyptic number.

It is an amenable number.

21234101552 is a deficient number, since it is larger than the sum of its proper divisors (19906970236).

21234101552 is a wasteful number, since it uses less digits than its factorization.

21234101552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327131355 (or 1327131349 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 21234101552 its reverse (25510143212), we get a palindrome (46744244764).

The spelling of 21234101552 in words is "twenty-one billion, two hundred thirty-four million, one hundred one thousand, five hundred fifty-two".