2101025421101 has 4 divisors (see below), whose sum is σ = 2224615151772. Its totient is φ = 1977435690432.

The previous prime is 2101025421031. The next prime is 2101025421113. The reversal of 2101025421101 is 1011245201012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1675145187076 + 425880234025 = 1294274^2 + 652595^2 .

It is not a de Polignac number, because 2101025421101 - 2¹⁰ = 2101025420077 is a prime.

It is a super-2 number, since 2×2101025421101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101025421701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61794865310 + ... + 61794865343.

It is an arithmetic number, because the mean of its divisors is an integer number (556153787943).

Almost surely, 2^{2101025421101} is an apocalyptic number.

It is an amenable number.

2101025421101 is a deficient number, since it is larger than the sum of its proper divisors (123589730671).

2101025421101 is a wasteful number, since it uses less digits than its factorization.

2101025421101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123589730670.

The product of its (nonzero) digits is 160, while the sum is 20.

The spelling of 2101025421101 in words is "two trillion, one hundred one billion, twenty-five million, four hundred twenty-one thousand, one hundred one".