21303123022012 has 48 divisors (see below), whose sum is σ = 41243257248480. Its totient is φ = 9564160326912.

The previous prime is 21303123022003. The next prime is 21303123022057. The reversal of 21303123022012 is 21022032130312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6625878 + ... + 9300994.

It is an arithmetic number, because the mean of its divisors is an integer number (859234526010).

Almost surely, 2^{21303123022012} is an apocalyptic number.

It is an amenable number.

21303123022012 is a deficient number, since it is larger than the sum of its proper divisors (19940134226468).

21303123022012 is a wasteful number, since it uses less digits than its factorization.

21303123022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679310 (or 2679308 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21303123022012 its reverse (21022032130312), we get a palindrome (42325155152324).

The spelling of 21303123022012 in words is "twenty-one trillion, three hundred three billion, one hundred twenty-three million, twenty-two thousand, twelve".