1011100220221 has 96 divisors (see below), whose sum is σ = 1322734694400. Its totient is φ = 752113866240.

The previous prime is 1011100220191. The next prime is 1011100220227. The reversal of 1011100220221 is 1220220011101.

It is not a de Polignac number, because 1011100220221 - 2⁹ = 1011100219709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011100220227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 481704630 + ... + 481706728.

It is an arithmetic number, because the mean of its divisors is an integer number (13778486400).

Almost surely, 2^{1011100220221} is an apocalyptic number.

It is an amenable number.

1011100220221 is a deficient number, since it is larger than the sum of its proper divisors (311634474179).

1011100220221 is a wasteful number, since it uses less digits than its factorization.

1011100220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315 (or 2274 counting only the distinct ones).

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

Adding to 1011100220221 its reverse (1220220011101), we get a palindrome (2231320231322).

It can be divided in two parts, 1011100 and 220221, that added together give a palindrome (1231321).

The spelling of 1011100220221 in words is "one trillion, eleven billion, one hundred million, two hundred twenty thousand, two hundred twenty-one".