212012110021021 has 8 divisors (see below), whose sum is σ = 212560434627840. Its totient is φ = 211463802370512.

The previous prime is 212012110020989. The next prime is 212012110021081. The reversal of 212012110021021 is 120120011210212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212012110021021 - 2⁵ = 212012110020989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212012110020986 and 212012110021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012110021081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20994096 + ... + 29407078.

It is an arithmetic number, because the mean of its divisors is an integer number (26570054328480).

Almost surely, 2^{212012110021021} is an apocalyptic number.

It is an amenable number.

212012110021021 is a deficient number, since it is larger than the sum of its proper divisors (548324606819).

212012110021021 is an equidigital number, since it uses as much as digits as its factorization.

212012110021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8478155.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212012110021021 its reverse (120120011210212), we get a palindrome (332132121231233).

The spelling of 212012110021021 in words is "two hundred twelve trillion, twelve billion, one hundred ten million, twenty-one thousand, twenty-one".