1012220001221 has 32 divisors (see below), whose sum is σ = 1262701415808. Its totient is φ = 797184368640.

The previous prime is 1012220001211. The next prime is 1012220001269. The reversal of 1012220001221 is 1221000222101.

It is not a de Polignac number, because 1012220001221 - 2²⁶ = 1012152892357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012220001196 and 1012220001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012220001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268370 + ... + 1447916.

It is an arithmetic number, because the mean of its divisors is an integer number (39459419244).

Almost surely, 2^{1012220001221} is an apocalyptic number.

1012220001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012220001221 is a deficient number, since it is larger than the sum of its proper divisors (250481414587).

1012220001221 is a wasteful number, since it uses less digits than its factorization.

1012220001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179941.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1012220001221 its reverse (1221000222101), we get a palindrome (2233220223322).

The spelling of 1012220001221 in words is "one trillion, twelve billion, two hundred twenty million, one thousand, two hundred twenty-one".