102021212121011 has 4 divisors (see below), whose sum is σ = 105539184952800. Its totient is φ = 98503239289224.

The previous prime is 102021212120981. The next prime is 102021212121043. The reversal of 102021212121011 is 110121212120201.

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

It is a cyclic number.

It is not a de Polignac number, because 102021212121011 - 2¹⁰ = 102021212119987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102021212121511) 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, 1758986415851 + ... + 1758986415908.

It is an arithmetic number, because the mean of its divisors is an integer number (26384796238200).

Almost surely, 2^{102021212121011} is an apocalyptic number.

102021212121011 is a deficient number, since it is larger than the sum of its proper divisors (3517972831789).

102021212121011 is an equidigital number, since it uses as much as digits as its factorization.

102021212121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517972831788.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 102021212121011 its reverse (110121212120201), we get a palindrome (212142424241212).

The spelling of 102021212121011 in words is "one hundred two trillion, twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, eleven".