1220001101 has 4 divisors (see below), whose sum is σ = 1330910304. Its totient is φ = 1109091900.

The previous prime is 1220001091. The next prime is 1220001109. The reversal of 1220001101 is 1011000221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220001101 - 2¹⁰ = 1220000077 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 (1220001109) 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, 55454585 + ... + 55454606.

It is an arithmetic number, because the mean of its divisors is an integer number (332727576).

Almost surely, 2^1220001101 is an apocalyptic number.

1220001101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220001101 is a deficient number, since it is larger than the sum of its proper divisors (110909203).

1220001101 is a wasteful number, since it uses less digits than its factorization.

1220001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110909202.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1220001101 is about 34928.5141539116. The cubic root of 1220001101 is about 1068.5300515835.

Adding to 1220001101 its reverse (1011000221), we get a palindrome (2231001322).

The spelling of 1220001101 in words is "one billion, two hundred twenty million, one thousand, one hundred one".