1201011221111 has 8 divisors (see below), whose sum is σ = 1293413865744. Its totient is φ = 1108611028800.

The previous prime is 1201011221063. The next prime is 1201011221129. The reversal of 1201011221111 is 1111221101021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201011221111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201011221191) 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, 475715 + ... + 1621211.

It is an arithmetic number, because the mean of its divisors is an integer number (161676733218).

Almost surely, 2^{1201011221111} is an apocalyptic number.

1201011221111 is a deficient number, since it is larger than the sum of its proper divisors (92402644633).

1201011221111 is a wasteful number, since it uses less digits than its factorization.

1201011221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226161.

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

Adding to 1201011221111 its reverse (1111221101021), we get a palindrome (2312232322132).

The spelling of 1201011221111 in words is "one trillion, two hundred one billion, eleven million, two hundred twenty-one thousand, one hundred eleven".