1021201022101 has 8 divisors (see below), whose sum is σ = 1100840602680. Its totient is φ = 941716535232.

The previous prime is 1021201022099. The next prime is 1021201022213. The reversal of 1021201022101 is 1012201021201.

It can be written as a sum of positive squares in 4 ways, for example, as 4025902500 + 1017175119601 = 63450^2 + 1008551^2 .

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 1021201022101 - 2¹ = 1021201022099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021201020101) 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, 38759746 + ... + 38786083.

It is an arithmetic number, because the mean of its divisors is an integer number (137605075335).

Almost surely, 2^{1021201022101} is an apocalyptic number.

It is an amenable number.

1021201022101 is a deficient number, since it is larger than the sum of its proper divisors (79639580579).

1021201022101 is a wasteful number, since it uses less digits than its factorization.

1021201022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77546855.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021201022101 its reverse (1012201021201), we get a palindrome (2033402043302).

The spelling of 1021201022101 in words is "one trillion, twenty-one billion, two hundred one million, twenty-two thousand, one hundred one".