21125150422 has 4 divisors (see below), whose sum is σ = 31687725636. Its totient is φ = 10562575210.

The previous prime is 21125150413. The next prime is 21125150429. The reversal of 21125150422 is 22405152112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21125150429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5281287604 + ... + 5281287607.

It is an arithmetic number, because the mean of its divisors is an integer number (7921931409).

Almost surely, 2^21125150422 is an apocalyptic number.

21125150422 is a deficient number, since it is larger than the sum of its proper divisors (10562575214).

21125150422 is a wasteful number, since it uses less digits than its factorization.

21125150422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10562575213.

The product of its (nonzero) digits is 1600, while the sum is 25.

The spelling of 21125150422 in words is "twenty-one billion, one hundred twenty-five million, one hundred fifty thousand, four hundred twenty-two".