21221112001010 has 8 divisors (see below), whose sum is σ = 38198001601836. Its totient is φ = 8488444800400.

The previous prime is 21221112001007. The next prime is 21221112001057. The reversal of 21221112001010 is 1010021112212.

It can be written as a sum of positive squares in 2 ways, for example, as 21187894386961 + 33217614049 = 4603031^2 + 182257^2 .

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, 1061055600041 + ... + 1061055600060.

Almost surely, 2^{21221112001010} is an apocalyptic number.

21221112001010 is a deficient number, since it is larger than the sum of its proper divisors (16976889600826).

21221112001010 is a wasteful number, since it uses less digits than its factorization.

21221112001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122111200108.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21221112001010 its reverse (1010021112212), we get a palindrome (22231133113222).

The spelling of 21221112001010 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, ten".