2100021221201 has 12 divisors (see below), whose sum is σ = 2270996174580. Its totient is φ = 1939449869280.

The previous prime is 2100021221153. The next prime is 2100021221237. The reversal of 2100021221201 is 1021221200012.

It can be written as a sum of positive squares in 2 ways, for example, as 1365803592976 + 734217628225 = 1168676^2 + 856865^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2100021221201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2100021224201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68429390 + ... + 68460071.

It is an arithmetic number, because the mean of its divisors is an integer number (189249681215).

Almost surely, 2^{2100021221201} is an apocalyptic number.

It is an amenable number.

2100021221201 is a deficient number, since it is larger than the sum of its proper divisors (170974953379).

2100021221201 is a wasteful number, since it uses less digits than its factorization.

2100021221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136889536 (or 136889513 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2100021221201 its reverse (1021221200012), we get a palindrome (3121242421213).

The spelling of 2100021221201 in words is "two trillion, one hundred billion, twenty-one million, two hundred twenty-one thousand, two hundred one".