1101021212111 has 4 divisors (see below), whose sum is σ = 1106610152472. Its totient is φ = 1095432271752.

The previous prime is 1101021212059. The next prime is 1101021212119. The reversal of 1101021212111 is 1112121201011.

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

It is a cyclic number.

It is not a de Polignac number, because 1101021212111 - 2⁶ = 1101021212047 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 (1101021212119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2794469885 + ... + 2794470278.

It is an arithmetic number, because the mean of its divisors is an integer number (276652538118).

Almost surely, 2^{1101021212111} is an apocalyptic number.

1101021212111 is a deficient number, since it is larger than the sum of its proper divisors (5588940361).

1101021212111 is an equidigital number, since it uses as much as digits as its factorization.

1101021212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588940360.

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

Adding to 1101021212111 its reverse (1112121201011), we get a palindrome (2213142413122).

The spelling of 1101021212111 in words is "one trillion, one hundred one billion, twenty-one million, two hundred twelve thousand, one hundred eleven".