1220032121 has 32 divisors (see below), whose sum is σ = 1580414976. Its totient is φ = 914256000.

The previous prime is 1220032109. The next prime is 1220032127. The reversal of 1220032121 is 1212300221.

It is a happy number.

It is not a de Polignac number, because 1220032121 - 2⁶ = 1220032057 is a prime.

It is a super-4 number, since 4×1220032121⁴ (a number of 37 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220032096 and 1220032105.

It is not an unprimeable number, because it can be changed into a prime (1220032127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221426 + ... + 226868.

It is an arithmetic number, because the mean of its divisors is an integer number (49387968).

Almost surely, 2^1220032121 is an apocalyptic number.

1220032121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220032121 is a deficient number, since it is larger than the sum of its proper divisors (360382855).

1220032121 is a wasteful number, since it uses less digits than its factorization.

1220032121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1220032121 is about 34928.9582008969. The cubic root of 1220032121 is about 1068.5391077287.

Adding to 1220032121 its reverse (1212300221), we get a palindrome (2432332342).

The spelling of 1220032121 in words is "one billion, two hundred twenty million, thirty-two thousand, one hundred twenty-one".