1021101101021 has 4 divisors (see below), whose sum is σ = 1025940442944. Its totient is φ = 1016261759100.

The previous prime is 1021101100969. The next prime is 1021101101029. The reversal of 1021101101021 is 1201011011201.

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 1021101101021 - 2²⁶ = 1021033992157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021101100993 and 1021101101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021101101029) 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, 2419670645 + ... + 2419671066.

It is an arithmetic number, because the mean of its divisors is an integer number (256485110736).

Almost surely, 2^{1021101101021} is an apocalyptic number.

It is an amenable number.

1021101101021 is a deficient number, since it is larger than the sum of its proper divisors (4839341923).

1021101101021 is an equidigital number, since it uses as much as digits as its factorization.

1021101101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839341922.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1021101101021 its reverse (1201011011201), we get a palindrome (2222112112222).

The spelling of 1021101101021 in words is "one trillion, twenty-one billion, one hundred one million, one hundred one thousand, twenty-one".