2101122202021 has 8 divisors (see below), whose sum is σ = 2130807988800. Its totient is φ = 2071438985280.

The previous prime is 2101122202009. The next prime is 2101122202027. The reversal of 2101122202021 is 1202022211012.

It is a happy number.

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-2101122202021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101122201986 and 2101122202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101122202027) 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, 1034845 + ... + 2296333.

It is an arithmetic number, because the mean of its divisors is an integer number (266350998600).

Almost surely, 2^{2101122202021} is an apocalyptic number.

It is an amenable number.

2101122202021 is a deficient number, since it is larger than the sum of its proper divisors (29685786779).

2101122202021 is a wasteful number, since it uses less digits than its factorization.

2101122202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285019.

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

Adding to 2101122202021 its reverse (1202022211012), we get a palindrome (3303144413033).

The spelling of 2101122202021 in words is "two trillion, one hundred one billion, one hundred twenty-two million, two hundred two thousand, twenty-one".