1220121201 has 8 divisors (see below), whose sum is σ = 1751968960. Its totient is φ = 750843792.

The previous prime is 1220121169. The next prime is 1220121247. The reversal of 1220121201 is 1021210221.

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

It is not a de Polignac number, because 1220121201 - 2⁵ = 1220121169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220121251) 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, 15642541 + ... + 15642618.

It is an arithmetic number, because the mean of its divisors is an integer number (218996120).

Almost surely, 2^1220121201 is an apocalyptic number.

It is an amenable number.

1220121201 is a deficient number, since it is larger than the sum of its proper divisors (531847759).

1220121201 is a wasteful number, since it uses less digits than its factorization.

1220121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31285175.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1220121201 is about 34930.2333373254. The cubic root of 1220121201 is about 1068.5651133684.

Adding to 1220121201 its reverse (1021210221), we get a palindrome (2241331422).

The spelling of 1220121201 in words is "one billion, two hundred twenty million, one hundred twenty-one thousand, two hundred one".