1022221212021 has 24 divisors (see below), whose sum is σ = 1488425746080. Its totient is φ = 676004205600.

The previous prime is 1022221211953. The next prime is 1022221212083. The reversal of 1022221212021 is 1202121222201.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1022221212021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1022221211985 and 1022221212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022221212421) 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 23 ways as a sum of consecutive naturals, for example, 1131486 + ... + 1823376.

It is an arithmetic number, because the mean of its divisors is an integer number (62017739420).

Almost surely, 2^{1022221212021} is an apocalyptic number.

It is an amenable number.

1022221212021 is a deficient number, since it is larger than the sum of its proper divisors (466204534059).

1022221212021 is a wasteful number, since it uses less digits than its factorization.

1022221212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693217 (or 693214 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1022221212021 its reverse (1202121222201), we get a palindrome (2224342434222).

The spelling of 1022221212021 in words is "one trillion, twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, twenty-one".