2101220212201 has 16 divisors (see below), whose sum is σ = 2427359736960. Its totient is φ = 1797626702080.

The previous prime is 2101220212187. The next prime is 2101220212211. The reversal of 2101220212201 is 1022120221012.

It is a happy number.

It is not a de Polignac number, because 2101220212201 - 2¹³ = 2101220204009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101220212211) 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, 973020 + ... + 2269186.

It is an arithmetic number, because the mean of its divisors is an integer number (151709983560).

Almost surely, 2^{2101220212201} is an apocalyptic number.

It is an amenable number.

2101220212201 is a deficient number, since it is larger than the sum of its proper divisors (326139524759).

2101220212201 is a wasteful number, since it uses less digits than its factorization.

2101220212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304864.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2101220212201 its reverse (1022120221012), we get a palindrome (3123340433213).

The spelling of 2101220212201 in words is "two trillion, one hundred one billion, two hundred twenty million, two hundred twelve thousand, two hundred one".