10011211021021 has 4 divisors (see below), whose sum is σ = 11441384024032. Its totient is φ = 8581038018012.

The previous prime is 10011211021003. The next prime is 10011211021033. The reversal of 10011211021021 is 12012011211001.

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 10011211021021 - 2⁵ = 10011211020989 is a prime.

It is a super-2 number, since 2×10011211021021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10011211020992 and 10011211021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011211021621) 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, 715086501495 + ... + 715086501508.

It is an arithmetic number, because the mean of its divisors is an integer number (2860346006008).

Almost surely, 2^{10011211021021} is an apocalyptic number.

It is an amenable number.

10011211021021 is a deficient number, since it is larger than the sum of its proper divisors (1430173003011).

10011211021021 is an equidigital number, since it uses as much as digits as its factorization.

10011211021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430173003010.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10011211021021 its reverse (12012011211001), we get a palindrome (22023222232022).

The spelling of 10011211021021 in words is "ten trillion, eleven billion, two hundred eleven million, twenty-one thousand, twenty-one".