1020111221111 has 8 divisors (see below), whose sum is σ = 1073879990400. Its totient is φ = 966350322360.

The previous prime is 1020111221069. The next prime is 1020111221167. The reversal of 1020111221111 is 1111221110201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020111221111 - 2³⁰ = 1019037479287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020111223111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700651 + ... + 2220908.

It is an arithmetic number, because the mean of its divisors is an integer number (134234998800).

Almost surely, 2^{1020111221111} is an apocalyptic number.

1020111221111 is a deficient number, since it is larger than the sum of its proper divisors (53768769289).

1020111221111 is a wasteful number, since it uses less digits than its factorization.

1020111221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935269.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1020111221111 its reverse (1111221110201), we get a palindrome (2131332331312).

The spelling of 1020111221111 in words is "one trillion, twenty billion, one hundred eleven million, two hundred twenty-one thousand, one hundred eleven".