1221020011022 has 8 divisors (see below), whose sum is σ = 2093177161776. Its totient is φ = 523294290432.

The previous prime is 1221020011009. The next prime is 1221020011091. The reversal of 1221020011022 is 2201100201221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 87215715073 = 1221020011022 / (1 + 2 + 2 + 1 + 0 + 2 + 0 + 0 + 1 + 1 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 1221020010988 and 1221020011006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43607857523 + ... + 43607857550.

It is an arithmetic number, because the mean of its divisors is an integer number (261647145222).

Almost surely, 2^{1221020011022} is an apocalyptic number.

1221020011022 is a deficient number, since it is larger than the sum of its proper divisors (872157150754).

1221020011022 is an equidigital number, since it uses as much as digits as its factorization.

1221020011022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87215715082.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221020011022 its reverse (2201100201221), we get a palindrome (3422120212243).

The spelling of 1221020011022 in words is "one trillion, two hundred twenty-one billion, twenty million, eleven thousand, twenty-two".