211021021001011 has 16 divisors (see below), whose sum is σ = 239215034449440. Its totient is φ = 184535890433280.

The previous prime is 211021021000969. The next prime is 211021021001017. The reversal of 211021021001011 is 110100120120112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211021021001011 - 2¹³ = 211021020992819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211021021000982 and 211021021001000.

It is not an unprimeable number, because it can be changed into a prime (211021021001017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68667351 + ... + 71674591.

It is an arithmetic number, because the mean of its divisors is an integer number (14950939653090).

Almost surely, 2^{211021021001011} is an apocalyptic number.

211021021001011 is a deficient number, since it is larger than the sum of its proper divisors (28194013448429).

211021021001011 is a wasteful number, since it uses less digits than its factorization.

211021021001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291366.

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

Adding to 211021021001011 its reverse (110100120120112), we get a palindrome (321121141121123).

The spelling of 211021021001011 in words is "two hundred eleven trillion, twenty-one billion, twenty-one million, one thousand, eleven".