21221221333202 has 32 divisors (see below), whose sum is σ = 36555492568320. Its totient is φ = 9137776810320.

The previous prime is 21221221333181. The next prime is 21221221333211. The reversal of 21221221333202 is 20233312212212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5492633 + ... + 8521235.

It is an arithmetic number, because the mean of its divisors is an integer number (1142359142760).

Almost surely, 2^{21221221333202} is an apocalyptic number.

21221221333202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221221333202 is a deficient number, since it is larger than the sum of its proper divisors (15334271235118).

21221221333202 is a wasteful number, since it uses less digits than its factorization.

21221221333202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045398.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21221221333202 its reverse (20233312212212), we get a palindrome (41454533545414).

The spelling of 21221221333202 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred twenty-one million, three hundred thirty-three thousand, two hundred two".