1220001212122 has 64 divisors (see below), whose sum is σ = 2333319229440. Its totient is φ = 464661288000.

The previous prime is 1220001212113. The next prime is 1220001212191. The reversal of 1220001212122 is 2212121000221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220001212096 and 1220001212105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 732333 + ... + 1725199.

It is an arithmetic number, because the mean of its divisors is an integer number (36458112960).

Almost surely, 2^{1220001212122} is an apocalyptic number.

1220001212122 is a deficient number, since it is larger than the sum of its proper divisors (1113318017318).

1220001212122 is a wasteful number, since it uses less digits than its factorization.

1220001212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993067.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220001212122 its reverse (2212121000221), we get a palindrome (3432122212343).

The spelling of 1220001212122 in words is "one trillion, two hundred twenty billion, one million, two hundred twelve thousand, one hundred twenty-two".