1212022222021 has 32 divisors (see below), whose sum is σ = 1325011968000. Its totient is φ = 1101998338560.

The previous prime is 1212022222003. The next prime is 1212022222063. The reversal of 1212022222021 is 1202222202121.

It is a cyclic number.

It is not a de Polignac number, because 1212022222021 - 2¹⁵ = 1212022189253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212022222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212022222321) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 339405166 + ... + 339408736.

It is an arithmetic number, because the mean of its divisors is an integer number (41406624000).

Almost surely, 2^{1212022222021} is an apocalyptic number.

It is an amenable number.

1212022222021 is a deficient number, since it is larger than the sum of its proper divisors (112989745979).

1212022222021 is a wasteful number, since it uses less digits than its factorization.

1212022222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5149.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1212022222021 its reverse (1202222202121), we get a palindrome (2414244424142).

The spelling of 1212022222021 in words is "one trillion, two hundred twelve billion, twenty-two million, two hundred twenty-two thousand, twenty-one".