10011212111021 has 4 divisors (see below), whose sum is σ = 10921322302944. Its totient is φ = 9101101919100.

The previous prime is 10011212110981. The next prime is 10011212111057. The reversal of 10011212111021 is 12011121211001.

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 10011212111021 - 2⁴² = 5613165599917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10011212110987 and 10011212111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011212114021) 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, 455055095945 + ... + 455055095966.

It is an arithmetic number, because the mean of its divisors is an integer number (2730330575736).

Almost surely, 2^{10011212111021} is an apocalyptic number.

10011212111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10011212111021 is a deficient number, since it is larger than the sum of its proper divisors (910110191923).

10011212111021 is an equidigital number, since it uses as much as digits as its factorization.

10011212111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910110191922.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 10011212111021 its reverse (12011121211001), we get a palindrome (22022333322022).

The spelling of 10011212111021 in words is "ten trillion, eleven billion, two hundred twelve million, one hundred eleven thousand, twenty-one".