21221112111002 has 8 divisors (see below), whose sum is σ = 31892531778336. Its totient is φ = 10590268184892.

The previous prime is 21221112110993. The next prime is 21221112111041. The reversal of 21221112111002 is 20011121112212.

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, 10143933998 + ... + 10143936089.

It is an arithmetic number, because the mean of its divisors is an integer number (3986566472292).

Almost surely, 2^{21221112111002} is an apocalyptic number.

21221112111002 is a deficient number, since it is larger than the sum of its proper divisors (10671419667334).

21221112111002 is a wasteful number, since it uses less digits than its factorization.

21221112111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20287870612.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21221112111002 its reverse (20011121112212), we get a palindrome (41232233223214).

The spelling of 21221112111002 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one hundred eleven thousand, two".