1011013101221 has 4 divisors (see below), whose sum is σ = 1011119298444. Its totient is φ = 1010906904000.

The previous prime is 1011013101173. The next prime is 1011013101299. The reversal of 1011013101221 is 1221013101101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 798824812900 + 212188288321 = 893770^2 + 460639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011013101221 - 2⁶ = 1011013101157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011013101196 and 1011013101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011013100221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53084330 + ... + 53103371.

It is an arithmetic number, because the mean of its divisors is an integer number (252779824611).

Almost surely, 2^{1011013101221} is an apocalyptic number.

It is an amenable number.

1011013101221 is a deficient number, since it is larger than the sum of its proper divisors (106197223).

1011013101221 is an equidigital number, since it uses as much as digits as its factorization.

1011013101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106197222.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1011013101221 its reverse (1221013101101), we get a palindrome (2232026202322).

The spelling of 1011013101221 in words is "one trillion, eleven billion, thirteen million, one hundred one thousand, two hundred twenty-one".