212121211020984 has 96 divisors (see below), whose sum is σ = 608330246537520. Its totient is φ = 66543292965888.

The previous prime is 212121211020889. The next prime is 212121211021019. The reversal of 212121211020984 is 489020112121212.

212121211020984 is a `hidden beast` number, since 2 + 121 + 212 + 110 + 209 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12070554 + ... + 23873430.

Almost surely, 2^{212121211020984} is an apocalyptic number.

212121211020984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212121211020984 is an abundant number, since it is smaller than the sum of its proper divisors (396209035516536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212121211020984 is a wasteful number, since it uses less digits than its factorization.

212121211020984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11817589 (or 11817582 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 212121211020984 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred eleven million, twenty thousand, nine hundred eighty-four".