1100221220121 has 8 divisors (see below), whose sum is σ = 1466967357984. Its totient is φ = 733477947840.

The previous prime is 1100221220101. The next prime is 1100221220141. The reversal of 1100221220121 is 1210221220011.

It is an interprime number because it is at equal distance from previous prime (1100221220101) and next prime (1100221220141).

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

It is not a de Polignac number, because 1100221220121 - 2⁹ = 1100221219609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1100221220121.

It is not an unprimeable number, because it can be changed into a prime (1100221220101) 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, 451441 + ... + 1550561.

It is an arithmetic number, because the mean of its divisors is an integer number (183370919748).

Almost surely, 2^{1100221220121} is an apocalyptic number.

It is an amenable number.

1100221220121 is a deficient number, since it is larger than the sum of its proper divisors (366746137863).

1100221220121 is a wasteful number, since it uses less digits than its factorization.

1100221220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432791.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1100221220121 its reverse (1210221220011), we get a palindrome (2310442440132).

The spelling of 1100221220121 in words is "one trillion, one hundred billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty-one".