212012011020021 has 16 divisors (see below), whose sum is σ = 283784963809536. Its totient is φ = 140790667126976.

The previous prime is 212012011019993. The next prime is 212012011020037. The reversal of 212012011020021 is 120020110210212.

It is a cyclic number.

It is not a de Polignac number, because 212012011020021 - 2¹⁷ = 212012010888949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012011020221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56644410 + ... + 60271163.

It is an arithmetic number, because the mean of its divisors is an integer number (17736560238096).

Almost surely, 2^{212012011020021} is an apocalyptic number.

It is an amenable number.

212012011020021 is a deficient number, since it is larger than the sum of its proper divisors (71772952789515).

212012011020021 is a wasteful number, since it uses less digits than its factorization.

212012011020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116917932.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212012011020021 its reverse (120020110210212), we get a palindrome (332032121230233).

The spelling of 212012011020021 in words is "two hundred twelve trillion, twelve billion, eleven million, twenty thousand, twenty-one".