21221112001006 has 32 divisors (see below), whose sum is σ = 34251713353728. Its totient is φ = 9836846690880.

The previous prime is 21221112000971. The next prime is 21221112001007. The reversal of 21221112001006 is 60010021112212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221112001007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47425375 + ... + 47870746.

It is an arithmetic number, because the mean of its divisors is an integer number (1070366042304).

Almost surely, 2^{21221112001006} is an apocalyptic number.

21221112001006 is a deficient number, since it is larger than the sum of its proper divisors (13030601352722).

21221112001006 is a wasteful number, since it uses less digits than its factorization.

21221112001006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95296296.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21221112001006 its reverse (60010021112212), we get a palindrome (81231133113218).

The spelling of 21221112001006 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, six".