1011001015221 has 8 divisors (see below), whose sum is σ = 1348590781824. Its totient is φ = 673705962720.

The previous prime is 1011001015181. The next prime is 1011001015247. The reversal of 1011001015221 is 1225101001101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1011001015221 - 2⁷ = 1011001015093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011001015221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011001013221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73670520 + ... + 73684241.

It is an arithmetic number, because the mean of its divisors is an integer number (168573847728).

Almost surely, 2^{1011001015221} is an apocalyptic number.

It is an amenable number.

1011001015221 is a deficient number, since it is larger than the sum of its proper divisors (337589766603).

1011001015221 is a wasteful number, since it uses less digits than its factorization.

1011001015221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147357051.

The product of its (nonzero) digits is 20, while the sum is 15.

Adding to 1011001015221 its reverse (1225101001101), we get a palindrome (2236102016322).

The spelling of 1011001015221 in words is "one trillion, eleven billion, one million, fifteen thousand, two hundred twenty-one".