10221001220091 has 8 divisors (see below), whose sum is σ = 13681028871504. Its totient is φ = 6787487191040.

The previous prime is 10221001220083. The next prime is 10221001220093. The reversal of 10221001220091 is 19002210012201.

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

It is a cyclic number.

It is not a de Polignac number, because 10221001220091 - 2³ = 10221001220083 is a prime.

It is a super-2 number, since 2×10221001220091² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10221001220093) 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, 6628404690 + ... + 6628406231.

It is an arithmetic number, because the mean of its divisors is an integer number (1710128608938).

Almost surely, 2^{10221001220091} is an apocalyptic number.

10221001220091 is a deficient number, since it is larger than the sum of its proper divisors (3460027651413).

10221001220091 is a wasteful number, since it uses less digits than its factorization.

10221001220091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13256811181.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 10221001220091 its reverse (19002210012201), we get a palindrome (29223211232292).

The spelling of 10221001220091 in words is "ten trillion, two hundred twenty-one billion, one million, two hundred twenty thousand, ninety-one".