21112072602 has 16 divisors (see below), whose sum is σ = 42802559040. Its totient is φ = 6940955232.

The previous prime is 21112072573. The next prime is 21112072603. The reversal of 21112072602 is 20627021112.

It is not an unprimeable number, because it can be changed into a prime (21112072603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24100102 + ... + 24100977.

It is an arithmetic number, because the mean of its divisors is an integer number (2675159940).

Almost surely, 2^21112072602 is an apocalyptic number.

21112072602 is an abundant number, since it is smaller than the sum of its proper divisors (21690486438).

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

21112072602 is a wasteful number, since it uses less digits than its factorization.

21112072602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48201157.

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 21112072602 its reverse (20627021112), we get a palindrome (41739093714).

The spelling of 21112072602 in words is "twenty-one billion, one hundred twelve million, seventy-two thousand, six hundred two".