1021100001201 has 64 divisors (see below), whose sum is σ = 1893665779200. Its totient is φ = 530226321408.

The previous prime is 1021100001139. The next prime is 1021100001211. The reversal of 1021100001201 is 1021000011201.

It is a happy number.

It is not a de Polignac number, because 1021100001201 - 2⁹ = 1021100000689 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1021100001211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5386180 + ... + 5572533.

It is an arithmetic number, because the mean of its divisors is an integer number (29588527800).

Almost surely, 2^{1021100001201} is an apocalyptic number.

It is an amenable number.

1021100001201 is a deficient number, since it is larger than the sum of its proper divisors (872565777999).

1021100001201 is a wasteful number, since it uses less digits than its factorization.

1021100001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10958775 (or 10958769 counting only the distinct ones).

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

Adding to 1021100001201 its reverse (1021000011201), we get a palindrome (2042100012402).

It can be divided in two parts, 102110000 and 1201, that added together give a palindrome (102111201).

The spelling of 1021100001201 in words is "one trillion, twenty-one billion, one hundred million, one thousand, two hundred one".