211123331101021 has 4 divisors (see below), whose sum is σ = 211123595702944. Its totient is φ = 211123066499100.

The previous prime is 211123331101019. The next prime is 211123331101043. The reversal of 211123331101021 is 120101133321112.

211123331101021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211123331101021 - 2¹ = 211123331101019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211123331100983 and 211123331101001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211123331101321) 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, 131100495 + ... + 132701116.

It is an arithmetic number, because the mean of its divisors is an integer number (52780898925736).

Almost surely, 2^{211123331101021} is an apocalyptic number.

It is an amenable number.

211123331101021 is a deficient number, since it is larger than the sum of its proper divisors (264601923).

211123331101021 is an equidigital number, since it uses as much as digits as its factorization.

211123331101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264601922.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 211123331101021 its reverse (120101133321112), we get a palindrome (331224464422133).

The spelling of 211123331101021 in words is "two hundred eleven trillion, one hundred twenty-three billion, three hundred thirty-one million, one hundred one thousand, twenty-one".