21213023102 has 8 divisors (see below), whose sum is σ = 31837346136. Its totient is φ = 10600574392.

The previous prime is 21213023101. The next prime is 21213023123. The reversal of 21213023102 is 20132031212.

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

It is a super-5 number, since 5×21213023102⁵ (a number of 53 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213023101) 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, 2964113 + ... + 2971260.

It is an arithmetic number, because the mean of its divisors is an integer number (3979668267).

Almost surely, 2^21213023102 is an apocalyptic number.

21213023102 is a deficient number, since it is larger than the sum of its proper divisors (10624323034).

21213023102 is a wasteful number, since it uses less digits than its factorization.

21213023102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5937162.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21213023102 its reverse (20132031212), we get a palindrome (41345054314).

The spelling of 21213023102 in words is "twenty-one billion, two hundred thirteen million, twenty-three thousand, one hundred two".