21221021021102 has 16 divisors (see below), whose sum is σ = 37960584187392. Its totient is φ = 8699300542680.

The previous prime is 21221021021099. The next prime is 21221021021117. The reversal of 21221021021102 is 20112012012212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32951895674 + ... + 32951896317.

It is an arithmetic number, because the mean of its divisors is an integer number (2372536511712).

Almost surely, 2^{21221021021102} is an apocalyptic number.

21221021021102 is a deficient number, since it is larger than the sum of its proper divisors (16739563166290).

21221021021102 is a wasteful number, since it uses less digits than its factorization.

21221021021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65903792023.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221021021102 its reverse (20112012012212), we get a palindrome (41333033033314).

The spelling of 21221021021102 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-one million, twenty-one thousand, one hundred two".