1000101011221 has 16 divisors (see below), whose sum is σ = 1079054210304. Its totient is φ = 921437659584.

The previous prime is 1000101011179. The next prime is 1000101011227. The reversal of 1000101011221 is 1221101010001.

It is not a de Polignac number, because 1000101011221 - 2⁷ = 1000101011093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000101011198 and 1000101011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000101011227) 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, 28461555 + ... + 28496671.

It is an arithmetic number, because the mean of its divisors is an integer number (67440888144).

Almost surely, 2^{1000101011221} is an apocalyptic number.

It is an amenable number.

1000101011221 is a deficient number, since it is larger than the sum of its proper divisors (78953199083).

1000101011221 is a wasteful number, since it uses less digits than its factorization.

1000101011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39180.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1000101011221 its reverse (1221101010001), we get a palindrome (2221202021222).

The spelling of 1000101011221 in words is "one trillion, one hundred one million, eleven thousand, two hundred twenty-one".