21360136121622 has 24 divisors (see below), whose sum is σ = 46280439195120. Its totient is φ = 7120023179280.

The previous prime is 21360136121603. The next prime is 21360136121633. The reversal of 21360136121622 is 22612163106312.

21360136121622 is a `hidden beast` number, since 2 + 1 + 3 + 6 + 0 + 1 + 3 + 6 + 1 + 21 + 622 = 666.

It is a super-3 number, since 3×21360136121622³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

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, 4714972 + ... + 8059232.

It is an arithmetic number, because the mean of its divisors is an integer number (1928351633130).

Almost surely, 2^{21360136121622} is an apocalyptic number.

21360136121622 is an abundant number, since it is smaller than the sum of its proper divisors (24920303073498).

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

21360136121622 is a wasteful number, since it uses less digits than its factorization.

21360136121622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3699108 (or 3699105 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

Adding to 21360136121622 its reverse (22612163106312), we get a palindrome (43972299227934).

The spelling of 21360136121622 in words is "twenty-one trillion, three hundred sixty billion, one hundred thirty-six million, one hundred twenty-one thousand, six hundred twenty-two".