1010020012221 has 16 divisors (see below), whose sum is σ = 1469164243968. Its totient is φ = 612114913200.

The previous prime is 1010020012219. The next prime is 1010020012237. The reversal of 1010020012221 is 1222100200101.

It is not a de Polignac number, because 1010020012221 - 2¹ = 1010020012219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1010020012197 and 1010020012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010020012201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 695430 + ... + 1582296.

It is an arithmetic number, because the mean of its divisors is an integer number (91822765248).

Almost surely, 2^{1010020012221} is an apocalyptic number.

1010020012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1010020012221 is a deficient number, since it is larger than the sum of its proper divisors (459144231747).

1010020012221 is a wasteful number, since it uses less digits than its factorization.

1010020012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921392.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1010020012221 its reverse (1222100200101), we get a palindrome (2232120212322).

The spelling of 1010020012221 in words is "one trillion, ten billion, twenty million, twelve thousand, two hundred twenty-one".