1201021000101 has 16 divisors (see below), whose sum is σ = 1916158861120. Its totient is φ = 739089846000.

The previous prime is 1201021000099. The next prime is 1201021000169. The reversal of 1201021000101 is 1010001201021.

It is a happy number.

It is not a de Polignac number, because 1201021000101 - 2¹ = 1201021000099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201021000171) 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, 1710855775 + ... + 1710856476.

It is an arithmetic number, because the mean of its divisors is an integer number (119759928820).

Almost surely, 2^{1201021000101} is an apocalyptic number.

It is an amenable number.

1201021000101 is a deficient number, since it is larger than the sum of its proper divisors (715137861019).

1201021000101 is a wasteful number, since it uses less digits than its factorization.

1201021000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421712273 (or 3421712267 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1201021000101 its reverse (1010001201021), we get a palindrome (2211022201122).

The spelling of 1201021000101 in words is "one trillion, two hundred one billion, twenty-one million, one hundred one", and thus it is an aban number.