212100021221000 has 128 divisors (see below), whose sum is σ = 546690147644160. Its totient is φ = 76378471488000.

The previous prime is 212100021220793. The next prime is 212100021221087. The reversal of 212100021221000 is 122120001212.

212100021221000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92468069 + ... + 94734068.

It is an arithmetic number, because the mean of its divisors is an integer number (4271016778470).

Almost surely, 2^{212100021221000} is an apocalyptic number.

212100021221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100021221000 is an abundant number, since it is smaller than the sum of its proper divisors (334590126423160).

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

212100021221000 is a wasteful number, since it uses less digits than its factorization.

212100021221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187202272 (or 187202258 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212100021221000 its reverse (122120001212), we get a palindrome (212222141222212).

The spelling of 212100021221000 in words is "two hundred twelve trillion, one hundred billion, twenty-one million, two hundred twenty-one thousand".