21221021121022 has 32 divisors (see below), whose sum is σ = 32157647222400. Its totient is φ = 10502311927008.

The previous prime is 21221021120977. The next prime is 21221021121059. The reversal of 21221021121022 is 22012112012212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133923213 + ... + 134081575.

It is an arithmetic number, because the mean of its divisors is an integer number (1004926475700).

Almost surely, 2^{21221021121022} is an apocalyptic number.

21221021121022 is a deficient number, since it is larger than the sum of its proper divisors (10936626101378).

21221021121022 is a wasteful number, since it uses less digits than its factorization.

21221021121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159960.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21221021121022 its reverse (22012112012212), we get a palindrome (43233133133234).

The spelling of 21221021121022 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty-one thousand, twenty-two".