212121029983 has 4 divisors (see below), whose sum is σ = 213525805168. Its totient is φ = 210716254800.

The previous prime is 212121029969. The next prime is 212121030013. The reversal of 212121029983 is 389920121212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212121029983 is a prime.

It is a super-3 number, since 3×212121029983³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121009983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702387366 + ... + 702387667.

It is an arithmetic number, because the mean of its divisors is an integer number (53381451292).

Almost surely, 2^212121029983 is an apocalyptic number.

212121029983 is a deficient number, since it is larger than the sum of its proper divisors (1404775185).

212121029983 is a wasteful number, since it uses less digits than its factorization.

212121029983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404775184.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 212121029983 in words is "two hundred twelve billion, one hundred twenty-one million, twenty-nine thousand, nine hundred eighty-three".