1220121012201 has 64 divisors (see below), whose sum is σ = 2164594790400. Its totient is φ = 593228987136.

The previous prime is 1220121012133. The next prime is 1220121012217. The reversal of 1220121012201 is 1022101210221.

It is not a de Polignac number, because 1220121012201 - 2¹⁰ = 1220121011177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220121012281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2986821 + ... + 3370658.

It is an arithmetic number, because the mean of its divisors is an integer number (33821793600).

Almost surely, 2^{1220121012201} is an apocalyptic number.

It is an amenable number.

1220121012201 is a deficient number, since it is larger than the sum of its proper divisors (944473778199).

1220121012201 is a wasteful number, since it uses less digits than its factorization.

1220121012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357558.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220121012201 its reverse (1022101210221), we get a palindrome (2242222222422).

The spelling of 1220121012201 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, twelve thousand, two hundred one".