21223231002 has 48 divisors (see below), whose sum is σ = 50508394560. Its totient is φ = 6410676096.

The previous prime is 21223230949. The next prime is 21223231019. The reversal of 21223231002 is 20013232212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1341183 + ... + 1356914.

It is an arithmetic number, because the mean of its divisors is an integer number (1052258220).

Almost surely, 2^21223231002 is an apocalyptic number.

21223231002 is an abundant number, since it is smaller than the sum of its proper divisors (29285163558).

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

21223231002 is a wasteful number, since it uses less digits than its factorization.

21223231002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698147 (or 2698144 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21223231002 its reverse (20013232212), we get a palindrome (41236463214).

The spelling of 21223231002 in words is "twenty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, two".