1021212211101 has 4 divisors (see below), whose sum is σ = 1361616281472. Its totient is φ = 680808140732.

The previous prime is 1021212211039. The next prime is 1021212211111. The reversal of 1021212211101 is 1011122121201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021212211101 - 2¹⁰ = 1021212210077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021212211111) 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, 170202035181 + ... + 170202035186.

It is an arithmetic number, because the mean of its divisors is an integer number (340404070368).

Almost surely, 2^{1021212211101} is an apocalyptic number.

It is an amenable number.

1021212211101 is a deficient number, since it is larger than the sum of its proper divisors (340404070371).

1021212211101 is an equidigital number, since it uses as much as digits as its factorization.

1021212211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340404070370.

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

Adding to 1021212211101 its reverse (1011122121201), we get a palindrome (2032334332302).

The spelling of 1021212211101 in words is "one trillion, twenty-one billion, two hundred twelve million, two hundred eleven thousand, one hundred one".