1021101212121 has 16 divisors (see below), whose sum is σ = 1451265331200. Its totient is φ = 636742658448.

The previous prime is 1021101212107. The next prime is 1021101212143. The reversal of 1021101212121 is 1212121011201.

It is a happy number.

1021101212121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021101212121 - 2⁶ = 1021101212057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021101212121.

It is not an unprimeable number, because it can be changed into a prime (1021101212191) 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, 113375601 + ... + 113384606.

It is an arithmetic number, because the mean of its divisors is an integer number (90704083200).

Almost surely, 2^{1021101212121} is an apocalyptic number.

It is an amenable number.

1021101212121 is a deficient number, since it is larger than the sum of its proper divisors (430164119079).

1021101212121 is a wasteful number, since it uses less digits than its factorization.

1021101212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226760308.

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

Adding to 1021101212121 its reverse (1212121011201), we get a palindrome (2233222223322).

The spelling of 1021101212121 in words is "one trillion, twenty-one billion, one hundred one million, two hundred twelve thousand, one hundred twenty-one".