2101000110021 has 24 divisors (see below), whose sum is σ = 3195579816000. Its totient is φ = 1326500183232.

The previous prime is 2101000109947. The next prime is 2101000110067. The reversal of 2101000110021 is 1200110001012.

It is a happy number.

It is not a de Polignac number, because 2101000110021 - 2¹⁴ = 2101000093637 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 2101000109985 and 2101000110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101000114021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1561441 + ... + 2576838.

It is an arithmetic number, because the mean of its divisors is an integer number (133149159000).

Almost surely, 2^{2101000110021} is an apocalyptic number.

It is an amenable number.

2101000110021 is a deficient number, since it is larger than the sum of its proper divisors (1094579705979).

2101000110021 is a wasteful number, since it uses less digits than its factorization.

2101000110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141273 (or 4141270 counting only the distinct ones).

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

Adding to 2101000110021 its reverse (1200110001012), we get a palindrome (3301110111033).

The spelling of 2101000110021 in words is "two trillion, one hundred one billion, one hundred ten thousand, twenty-one".