21152520022 has 8 divisors (see below), whose sum is σ = 32130410400. Its totient is φ = 10442383224.

The previous prime is 21152520001. The next prime is 21152520029. The reversal of 21152520022 is 22002525112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21152520022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21152519975 and 21152520002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152520029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66938197 + ... + 66938512.

It is an arithmetic number, because the mean of its divisors is an integer number (4016301300).

Almost surely, 2^21152520022 is an apocalyptic number.

21152520022 is a deficient number, since it is larger than the sum of its proper divisors (10977890378).

21152520022 is a wasteful number, since it uses less digits than its factorization.

21152520022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133876790.

The product of its (nonzero) digits is 800, while the sum is 22.

The spelling of 21152520022 in words is "twenty-one billion, one hundred fifty-two million, five hundred twenty thousand, twenty-two".