1021000121222 has 4 divisors (see below), whose sum is σ = 1531500181836. Its totient is φ = 510500060610.

The previous prime is 1021000121209. The next prime is 1021000121249. The reversal of 1021000121222 is 2221210001201.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1021000121197 and 1021000121206.

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 as a sum of consecutive naturals, namely, 255250030304 + ... + 255250030307.

It is an arithmetic number, because the mean of its divisors is an integer number (382875045459).

Almost surely, 2^{1021000121222} is an apocalyptic number.

1021000121222 is a deficient number, since it is larger than the sum of its proper divisors (510500060614).

1021000121222 is an equidigital number, since it uses as much as digits as its factorization.

1021000121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510500060613.

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

Adding to 1021000121222 its reverse (2221210001201), we get a palindrome (3242210122423).

The spelling of 1021000121222 in words is "one trillion, twenty-one billion, one hundred twenty-one thousand, two hundred twenty-two".