1221020012022 has 16 divisors (see below), whose sum is σ = 2452703957040. Its totient is φ = 405229348512.

The previous prime is 1221020011999. The next prime is 1221020012087. The reversal of 1221020012022 is 2202100201221.

It is a junction number, because it is equal to n+sod(n) for n = 1221020011992 and 1221020012010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444329053 + ... + 444331800.

It is an arithmetic number, because the mean of its divisors is an integer number (153293997315).

Almost surely, 2^{1221020012022} is an apocalyptic number.

1221020012022 is an abundant number, since it is smaller than the sum of its proper divisors (1231683945018).

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

1221020012022 is a wasteful number, since it uses less digits than its factorization.

1221020012022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888661087.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1221020012022 its reverse (2202100201221), we get a palindrome (3423120213243).

The spelling of 1221020012022 in words is "one trillion, two hundred twenty-one billion, twenty million, twelve thousand, twenty-two".