101011221001 has 4 divisors (see below), whose sum is σ = 101033919504. Its totient is φ = 100988522500.

The previous prime is 101011220957. The next prime is 101011221011. The reversal of 101011221001 is 100122110101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101011221001 - 2⁷ = 101011220873 is a prime.

It is a super-3 number, since 3×101011221001³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101011221011) 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, 11342575 + ... + 11351476.

It is an arithmetic number, because the mean of its divisors is an integer number (25258479876).

Almost surely, 2^101011221001 is an apocalyptic number.

It is an amenable number.

101011221001 is a deficient number, since it is larger than the sum of its proper divisors (22698503).

101011221001 is an equidigital number, since it uses as much as digits as its factorization.

101011221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22698502.

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

Adding to 101011221001 its reverse (100122110101), we get a palindrome (201133331102).

The spelling of 101011221001 in words is "one hundred one billion, eleven million, two hundred twenty-one thousand, one".