20121021002 has 8 divisors (see below), whose sum is σ = 30606623712. Its totient is φ = 9918813100.

The previous prime is 20121021001. The next prime is 20121021031. The reversal of 20121021002 is 20012012102.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20121021001) 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, 70848524 + ... + 70848807.

It is an arithmetic number, because the mean of its divisors is an integer number (3825827964).

Almost surely, 2^20121021002 is an apocalyptic number.

20121021002 is a deficient number, since it is larger than the sum of its proper divisors (10485602710).

20121021002 is a wasteful number, since it uses less digits than its factorization.

20121021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141697404.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20121021002 its reverse (20012012102), we get a palindrome (40133033104).

The spelling of 20121021002 in words is "twenty billion, one hundred twenty-one million, twenty-one thousand, two".