212011020000021 has 16 divisors (see below), whose sum is σ = 318327396599808. Its totient is φ = 124346639295600.

The previous prime is 212011019999971. The next prime is 212011020000089. The reversal of 212011020000021 is 120000020110212.

It is not a de Polignac number, because 212011020000021 - 2⁴² = 207612973488917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212011019999961 and 212011020000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011020000121) 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, 103622198391 + ... + 103622200436.

It is an arithmetic number, because the mean of its divisors is an integer number (19895462287488).

Almost surely, 2^{212011020000021} is an apocalyptic number.

It is an amenable number.

212011020000021 is a deficient number, since it is larger than the sum of its proper divisors (106316376599787).

212011020000021 is a wasteful number, since it uses less digits than its factorization.

212011020000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207244398872.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212011020000021 its reverse (120000020110212), we get a palindrome (332011040110233).

The spelling of 212011020000021 in words is "two hundred twelve trillion, eleven billion, twenty million, twenty-one", and thus it is an aban number.