2120021010101 has 8 divisors (see below), whose sum is σ = 2179136646360. Its totient is φ = 2061613345792.

The previous prime is 2120021010091. The next prime is 2120021010109. The reversal of 2120021010101 is 1010101200212.

It can be written as a sum of positive squares in 4 ways, for example, as 19217167876 + 2100803842225 = 138626^2 + 1449415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120021010101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120021010109) 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, 176986916 + ... + 176998893.

It is an arithmetic number, because the mean of its divisors is an integer number (272392080795).

Almost surely, 2^{2120021010101} is an apocalyptic number.

It is an amenable number.

2120021010101 is a deficient number, since it is larger than the sum of its proper divisors (59115636259).

2120021010101 is a wasteful number, since it uses less digits than its factorization.

2120021010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353985975.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2120021010101 its reverse (1010101200212), we get a palindrome (3130122210313).

The spelling of 2120021010101 in words is "two trillion, one hundred twenty billion, twenty-one million, ten thousand, one hundred one".