1021000111222 has 16 divisors (see below), whose sum is σ = 1884923282592. Its totient is φ = 403912131840.

The previous prime is 1021000111147. The next prime is 1021000111267. The reversal of 1021000111222 is 2221110001201.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2804945179 + ... + 2804945542.

It is an arithmetic number, because the mean of its divisors is an integer number (117807705162).

Almost surely, 2^{1021000111222} is an apocalyptic number.

1021000111222 is a deficient number, since it is larger than the sum of its proper divisors (863923171370).

1021000111222 is a wasteful number, since it uses less digits than its factorization.

1021000111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609890743.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021000111222 its reverse (2221110001201), we get a palindrome (3242110112423).

The spelling of 1021000111222 in words is "one trillion, twenty-one billion, one hundred eleven thousand, two hundred twenty-two".