1221010201120 has 24 divisors (see below), whose sum is σ = 2884636600524. Its totient is φ = 488404080384.

The previous prime is 1221010201111. The next prime is 1221010201141. The reversal of 1221010201120 is 211020101221.

It can be written as a sum of positive squares in 2 ways, for example, as 1126901141136 + 94109059984 = 1061556^2 + 306772^2 .

It is a super-2 number, since 2×1221010201120² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221010201120.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3815656719 + ... + 3815657038.

Almost surely, 2^{1221010201120} is an apocalyptic number.

1221010201120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221010201120 is an abundant number, since it is smaller than the sum of its proper divisors (1663626399404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221010201120 is an equidigital number, since it uses as much as digits as its factorization.

1221010201120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7631313772 (or 7631313764 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221010201120 its reverse (211020101221), we get a palindrome (1432030302341).

The spelling of 1221010201120 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred one thousand, one hundred twenty".