21212021121002 has 8 divisors (see below), whose sum is σ = 31822787049312. Its totient is φ = 10604425437900.

The previous prime is 21212021121001. The next prime is 21212021121007. The reversal of 21212021121002 is 20012112021212.

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 (21212021121001) 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, 792544574 + ... + 792571337.

It is an arithmetic number, because the mean of its divisors is an integer number (3977848381164).

Almost surely, 2^{21212021121002} is an apocalyptic number.

21212021121002 is a deficient number, since it is larger than the sum of its proper divisors (10610765928310).

21212021121002 is a wasteful number, since it uses less digits than its factorization.

21212021121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585122604.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21212021121002 its reverse (20012112021212), we get a palindrome (41224133142214).

The spelling of 21212021121002 in words is "twenty-one trillion, two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, two".