1220121101 has 8 divisors (see below), whose sum is σ = 1230516000. Its totient is φ = 1209766320.

The previous prime is 1220121083. The next prime is 1220121113. The reversal of 1220121101 is 1011210221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220121101 - 2⁶ = 1220121037 is a prime.

It is a super-2 number, since 2×1220121101² = 2977391002210904402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220121151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52706 + ... + 72236.

It is an arithmetic number, because the mean of its divisors is an integer number (153814500).

Almost surely, 2^1220121101 is an apocalyptic number.

It is an amenable number.

1220121101 is a deficient number, since it is larger than the sum of its proper divisors (10394899).

1220121101 is a wasteful number, since it uses less digits than its factorization.

1220121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20059.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1220121101 is about 34930.2319059007. The cubic root of 1220121101 is about 1068.5650841755.

Adding to 1220121101 its reverse (1011210221), we get a palindrome (2231331322).

The spelling of 1220121101 in words is "one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred one".