1021212321101 has 16 divisors (see below), whose sum is σ = 1207393088640. Its totient is φ = 845107300800.

The previous prime is 1021212321029. The next prime is 1021212321161. The reversal of 1021212321101 is 1011232121201.

It is a happy number.

It is not a de Polignac number, because 1021212321101 - 2³⁰ = 1020138579277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021212321101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021212321161) 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, 5821070 + ... + 5993936.

It is an arithmetic number, because the mean of its divisors is an integer number (75462068040).

Almost surely, 2^{1021212321101} is an apocalyptic number.

It is an amenable number.

1021212321101 is a deficient number, since it is larger than the sum of its proper divisors (186180767539).

1021212321101 is a wasteful number, since it uses less digits than its factorization.

1021212321101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202004.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1021212321101 its reverse (1011232121201), we get a palindrome (2032444442302).

The spelling of 1021212321101 in words is "one trillion, twenty-one billion, two hundred twelve million, three hundred twenty-one thousand, one hundred one".