1011002011221 has 8 divisors (see below), whose sum is σ = 1361090086720. Its totient is φ = 667457638272.

The previous prime is 1011002011171. The next prime is 1011002011267. The reversal of 1011002011221 is 1221102001101.

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

It is not a de Polignac number, because 1011002011221 - 2¹³ = 1011002003029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011002011197 and 1011002011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011002011321) 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, 1635925276 + ... + 1635925893.

It is an arithmetic number, because the mean of its divisors is an integer number (170136260840).

Almost surely, 2^{1011002011221} is an apocalyptic number.

It is an amenable number.

1011002011221 is a deficient number, since it is larger than the sum of its proper divisors (350088075499).

1011002011221 is a wasteful number, since it uses less digits than its factorization.

1011002011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271851275.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1011002011221 its reverse (1221102001101), we get a palindrome (2232104012322).

The spelling of 1011002011221 in words is "one trillion, eleven billion, two million, eleven thousand, two hundred twenty-one".