21545050122 has 24 divisors (see below), whose sum is σ = 46694533860. Its totient is φ = 7179592320.

The previous prime is 21545050117. The next prime is 21545050141. The reversal of 21545050122 is 22105054512.

21545050122 is a `hidden beast` number, since 2 + 154 + 5 + 0 + 501 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15979740921 + 5565309201 = 126411^2 + 74601^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110079 + ... + 234962.

Almost surely, 2^21545050122 is an apocalyptic number.

21545050122 is an abundant number, since it is smaller than the sum of its proper divisors (25149483738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21545050122 is a wasteful number, since it uses less digits than its factorization.

21545050122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348518 (or 348515 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 21545050122 in words is "twenty-one billion, five hundred forty-five million, fifty thousand, one hundred twenty-two".