121220111221006 has 32 divisors (see below), whose sum is σ = 208009337073408. Its totient is φ = 51900635666880.

The previous prime is 121220111220983. The next prime is 121220111221007. The reversal of 121220111221006 is 600122111022121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111221007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82923781 + ... + 84372943.

It is an arithmetic number, because the mean of its divisors is an integer number (6500291783544).

Almost surely, 2^{121220111221006} is an apocalyptic number.

121220111221006 is a deficient number, since it is larger than the sum of its proper divisors (86789225852402).

121220111221006 is a wasteful number, since it uses less digits than its factorization.

121220111221006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455016.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 121220111221006 its reverse (600122111022121), we get a palindrome (721342222243127).

The spelling of 121220111221006 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, six".