212011111201021 has 32 divisors (see below), whose sum is σ = 239763362342400. Its totient is φ = 185699950296000.

The previous prime is 212011111200991. The next prime is 212011111201027. The reversal of 212011111201021 is 120102111110212.

It is a cyclic number.

It is not a de Polignac number, because 212011111201021 - 2⁹ = 212011111200509 is a prime.

It is a super-2 number, since 2×212011111201021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212011111200986 and 212011111201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011111201027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3008964490 + ... + 3009034948.

It is an arithmetic number, because the mean of its divisors is an integer number (7492605073200).

Almost surely, 2^{212011111201021} is an apocalyptic number.

It is an amenable number.

212011111201021 is a deficient number, since it is larger than the sum of its proper divisors (27752251141379).

212011111201021 is a wasteful number, since it uses less digits than its factorization.

212011111201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90201.

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

Adding to 212011111201021 its reverse (120102111110212), we get a palindrome (332113222311233).

The spelling of 212011111201021 in words is "two hundred twelve trillion, eleven billion, one hundred eleven million, two hundred one thousand, twenty-one".