212012102122021 has 8 divisors (see below), whose sum is σ = 212057630978688. Its totient is φ = 211966576500000.

The previous prime is 212012102122003. The next prime is 212012102122039. The reversal of 212012102122021 is 120221201210212.

It is an interprime number because it is at equal distance from previous prime (212012102122003) and next prime (212012102122039).

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 212012102122021 - 2²⁵ = 212012068567589 is a prime.

It is a super-2 number, since 2×212012102122021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212012102122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012102122061) 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, 132651396 + ... + 134240146.

It is an arithmetic number, because the mean of its divisors is an integer number (26507203872336).

Almost surely, 2^{212012102122021} is an apocalyptic number.

It is an amenable number.

212012102122021 is a deficient number, since it is larger than the sum of its proper divisors (45528856667).

212012102122021 is a wasteful number, since it uses less digits than its factorization.

212012102122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617323.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212012102122021 its reverse (120221201210212), we get a palindrome (332233303332233).

The spelling of 212012102122021 in words is "two hundred twelve trillion, twelve billion, one hundred two million, one hundred twenty-two thousand, twenty-one".