21221112001011 has 8 divisors (see below), whose sum is σ = 30471340309200. Its totient is φ = 13059145846752.

The previous prime is 21221112001007. The next prime is 21221112001057. The reversal of 21221112001011 is 11010021112212.

It is a happy number.

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

It is not a de Polignac number, because 21221112001011 - 2² = 21221112001007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221112001091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272065538436 + ... + 272065538513.

It is an arithmetic number, because the mean of its divisors is an integer number (3808917538650).

Almost surely, 2^{21221112001011} is an apocalyptic number.

21221112001011 is a deficient number, since it is larger than the sum of its proper divisors (9250228308189).

21221112001011 is a wasteful number, since it uses less digits than its factorization.

21221112001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544131076965.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21221112001011 its reverse (11010021112212), we get a palindrome (32231133113223).

The spelling of 21221112001011 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, eleven".