1202011221111 has 4 divisors (see below), whose sum is σ = 1602681628152. Its totient is φ = 801340814072.

The previous prime is 1202011221031. The next prime is 1202011221119. The reversal of 1202011221111 is 1111221102021.

It is a happy number.

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 1202011221111 - 2²⁵ = 1201977666679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202011221119) 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, 200335203516 + ... + 200335203521.

It is an arithmetic number, because the mean of its divisors is an integer number (400670407038).

Almost surely, 2^{1202011221111} is an apocalyptic number.

1202011221111 is a deficient number, since it is larger than the sum of its proper divisors (400670407041).

1202011221111 is an equidigital number, since it uses as much as digits as its factorization.

1202011221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400670407040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1202011221111 its reverse (1111221102021), we get a palindrome (2313232323132).

The spelling of 1202011221111 in words is "one trillion, two hundred two billion, eleven million, two hundred twenty-one thousand, one hundred eleven".