212120202121011 has 24 divisors (see below), whose sum is σ = 314684199541920. Its totient is φ = 137588254183296.

The previous prime is 212120202120977. The next prime is 212120202121039. The reversal of 212120202121011 is 110121202021212.

212120202121011 is a `hidden beast` number, since 212 + 120 + 20 + 212 + 101 + 1 = 666.

It is not a de Polignac number, because 212120202121011 - 2⁹ = 212120202120499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212120202121511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6781935 + ... + 21684903.

It is an arithmetic number, because the mean of its divisors is an integer number (13111841647580).

Almost surely, 2^{212120202121011} is an apocalyptic number.

212120202121011 is a deficient number, since it is larger than the sum of its proper divisors (102563997420909).

212120202121011 is a wasteful number, since it uses less digits than its factorization.

212120202121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14945755 (or 14945752 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212120202121011 its reverse (110121202021212), we get a palindrome (322241404142223).

The spelling of 212120202121011 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred two million, one hundred twenty-one thousand, eleven".