2121102102021 has 8 divisors (see below), whose sum is σ = 3232155584064. Its totient is φ = 1212058344000.

The previous prime is 2121102102019. The next prime is 2121102102047. The reversal of 2121102102021 is 1202012011212.

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

It is not a de Polignac number, because 2121102102021 - 2¹ = 2121102102019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121102102001) 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, 50502430980 + ... + 50502431021.

It is an arithmetic number, because the mean of its divisors is an integer number (404019448008).

Almost surely, 2^{2121102102021} is an apocalyptic number.

2121102102021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2121102102021 is a deficient number, since it is larger than the sum of its proper divisors (1111053482043).

2121102102021 is a wasteful number, since it uses less digits than its factorization.

2121102102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101004862011.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121102102021 its reverse (1202012011212), we get a palindrome (3323114113233).

The spelling of 2121102102021 in words is "two trillion, one hundred twenty-one billion, one hundred two million, one hundred two thousand, twenty-one".