212001022011101 has 4 divisors (see below), whose sum is σ = 213945985515900. Its totient is φ = 210056058506304.

The previous prime is 212001022010971. The next prime is 212001022011139. The reversal of 212001022011101 is 101110220100212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53029927087225 + 158971094923876 = 7282165^2 + 12608374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212001022011101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001022010101) 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, 972481752236 + ... + 972481752453.

It is an arithmetic number, because the mean of its divisors is an integer number (53486496378975).

Almost surely, 2^{212001022011101} is an apocalyptic number.

It is an amenable number.

212001022011101 is a deficient number, since it is larger than the sum of its proper divisors (1944963504799).

212001022011101 is a wasteful number, since it uses less digits than its factorization.

212001022011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944963504798.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212001022011101 its reverse (101110220100212), we get a palindrome (313111242111313).

The spelling of 212001022011101 in words is "two hundred twelve trillion, one billion, twenty-two million, eleven thousand, one hundred one".