21221012112002 has 8 divisors (see below), whose sum is σ = 31922725957500. Its totient is φ = 10580103459504.

The previous prime is 21221012111963. The next prime is 21221012112011. The reversal of 21221012112002 is 20021121012212.

It can be written as a sum of positive squares in 2 ways, for example, as 21185961158041 + 35050953961 = 4602821^2 + 187219^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15201297377 + ... + 15201298772.

Almost surely, 2^{21221012112002} is an apocalyptic number.

21221012112002 is a deficient number, since it is larger than the sum of its proper divisors (10701713845498).

21221012112002 is a wasteful number, since it uses less digits than its factorization.

21221012112002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30402596500.

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

Adding to 21221012112002 its reverse (20021121012212), we get a palindrome (41242133124214).

The spelling of 21221012112002 in words is "twenty-one trillion, two hundred twenty-one billion, twelve million, one hundred twelve thousand, two".