211021001121012 has 12 divisors (see below), whose sum is σ = 492382335949056. Its totient is φ = 70340333707000.

The previous prime is 211021001120987. The next prime is 211021001121019. The reversal of 211021001121012 is 210121100120112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×211021001121012² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211021001120982 and 211021001121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021001121019) 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, 8792541713364 + ... + 8792541713387.

It is an arithmetic number, because the mean of its divisors is an integer number (41031861329088).

Almost surely, 2^{211021001121012} is an apocalyptic number.

It is an amenable number.

211021001121012 is an abundant number, since it is smaller than the sum of its proper divisors (281361334828044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211021001121012 is a wasteful number, since it uses less digits than its factorization.

211021001121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17585083426758 (or 17585083426756 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211021001121012 its reverse (210121100120112), we get a palindrome (421142101241124).

The spelling of 211021001121012 in words is "two hundred eleven trillion, twenty-one billion, one million, one hundred twenty-one thousand, twelve".