1210001220111 has 8 divisors (see below), whose sum is σ = 1624941687040. Its totient is φ = 800864116632.

The previous prime is 1210001220107. The next prime is 1210001220133. The reversal of 1210001220111 is 1110221000121.

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

It is not a de Polignac number, because 1210001220111 - 2² = 1210001220107 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 (1210001220011) 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, 1450840375 + ... + 1450841208.

It is an arithmetic number, because the mean of its divisors is an integer number (203117710880).

Almost surely, 2^{1210001220111} is an apocalyptic number.

1210001220111 is a deficient number, since it is larger than the sum of its proper divisors (414940466929).

1210001220111 is a wasteful number, since it uses less digits than its factorization.

1210001220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901681725.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1210001220111 its reverse (1110221000121), we get a palindrome (2320222220232).

The spelling of 1210001220111 in words is "one trillion, two hundred ten billion, one million, two hundred twenty thousand, one hundred eleven".