1220002120001 has 12 divisors (see below), whose sum is σ = 1419293072448. Its totient is φ = 1045637310312.

The previous prime is 1220002119997. The next prime is 1220002120121. The reversal of 1220002120001 is 1000212000221.

It is a happy number.

It is not a de Polignac number, because 1220002120001 - 2² = 1220002119997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220002120801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276341 + ... + 1586306.

It is an arithmetic number, because the mean of its divisors is an integer number (118274422704).

Almost surely, 2^{1220002120001} is an apocalyptic number.

It is an amenable number.

1220002120001 is a deficient number, since it is larger than the sum of its proper divisors (199290952447).

1220002120001 is a wasteful number, since it uses less digits than its factorization.

1220002120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876028 (or 1876021 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1220002120001 its reverse (1000212000221), we get a palindrome (2220214120222).

The spelling of 1220002120001 in words is "one trillion, two hundred twenty billion, two million, one hundred twenty thousand, one".