1021121212101 has 8 divisors (see below), whose sum is σ = 1441582887744. Its totient is φ = 640703505600.

The previous prime is 1021121212081. The next prime is 1021121212117. The reversal of 1021121212101 is 1012121211201.

It is a happy number.

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

It is not a de Polignac number, because 1021121212101 - 2⁷ = 1021121211973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021121212121) 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, 10010992225 + ... + 10010992326.

It is an arithmetic number, because the mean of its divisors is an integer number (180197860968).

Almost surely, 2^{1021121212101} is an apocalyptic number.

It is an amenable number.

1021121212101 is a deficient number, since it is larger than the sum of its proper divisors (420461675643).

1021121212101 is a wasteful number, since it uses less digits than its factorization.

1021121212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20021984571.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1021121212101 its reverse (1012121211201), we get a palindrome (2033242423302).

The spelling of 1021121212101 in words is "one trillion, twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred one".