1001221012101 has 16 divisors (see below), whose sum is σ = 1414595461824. Its totient is φ = 627725117184.

The previous prime is 1001221012097. The next prime is 1001221012109. The reversal of 1001221012101 is 1012101221001.

1001221012101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1001221012101 - 2² = 1001221012097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001221012109) 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, 7621555 + ... + 7751808.

It is an arithmetic number, because the mean of its divisors is an integer number (88412216364).

Almost surely, 2^{1001221012101} is an apocalyptic number.

It is an amenable number.

1001221012101 is a deficient number, since it is larger than the sum of its proper divisors (413374449723).

1001221012101 is a wasteful number, since it uses less digits than its factorization.

1001221012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15374660.

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

Adding to 1001221012101 its reverse (1012101221001), we get a palindrome (2013322233102).

The spelling of 1001221012101 in words is "one trillion, one billion, two hundred twenty-one million, twelve thousand, one hundred one".