1221021141522 has 32 divisors (see below), whose sum is σ = 3005590503552. Its totient is φ = 322027553664.

The previous prime is 1221021141503. The next prime is 1221021141547. The reversal of 1221021141522 is 2251411201221.

It is a junction number, because it is equal to n+sod(n) for n = 1221021141492 and 1221021141501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1118150683 + ... + 1118151774.

It is an arithmetic number, because the mean of its divisors is an integer number (93924703236).

Almost surely, 2^{1221021141522} is an apocalyptic number.

1221021141522 is an abundant number, since it is smaller than the sum of its proper divisors (1784569362030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221021141522 is a wasteful number, since it uses less digits than its factorization.

1221021141522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236302482.

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 1221021141522 its reverse (2251411201221), we get a palindrome (3472432342743).

The spelling of 1221021141522 in words is "one trillion, two hundred twenty-one billion, twenty-one million, one hundred forty-one thousand, five hundred twenty-two".