21012340150 has 12 divisors (see below), whose sum is σ = 39082952772. Its totient is φ = 8404936040.

The previous prime is 21012340147. The next prime is 21012340157. The reversal of 21012340150 is 5104321012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012340157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210123352 + ... + 210123451.

It is an arithmetic number, because the mean of its divisors is an integer number (3256912731).

Almost surely, 2^21012340150 is an apocalyptic number.

21012340150 is a deficient number, since it is larger than the sum of its proper divisors (18070612622).

21012340150 is a wasteful number, since it uses less digits than its factorization.

21012340150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420246815 (or 420246810 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 21012340150 its reverse (5104321012), we get a palindrome (26116661162).

The spelling of 21012340150 in words is "twenty-one billion, twelve million, three hundred forty thousand, one hundred fifty".