2102243041021 has 16 divisors (see below), whose sum is σ = 2199897697536. Its totient is φ = 2007302846976.

The previous prime is 2102243041013. The next prime is 2102243041079. The reversal of 2102243041021 is 1201403422012.

It is a cyclic number.

It is not a de Polignac number, because 2102243041021 - 2³ = 2102243041013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102243040983 and 2102243041001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102243041081) 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, 2608645 + ... + 3318058.

It is an arithmetic number, because the mean of its divisors is an integer number (137493606096).

Almost surely, 2^{2102243041021} is an apocalyptic number.

It is an amenable number.

2102243041021 is a deficient number, since it is larger than the sum of its proper divisors (97654656515).

2102243041021 is a wasteful number, since it uses less digits than its factorization.

2102243041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5926932.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 2102243041021 its reverse (1201403422012), we get a palindrome (3303646463033).

The spelling of 2102243041021 in words is "two trillion, one hundred two billion, two hundred forty-three million, forty-one thousand, twenty-one".