212021121329 has 8 divisors (see below), whose sum is σ = 221292751680. Its totient is φ = 202753934416.

The previous prime is 212021121311. The next prime is 212021121331. The reversal of 212021121329 is 923121120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212021121329 - 2¹² = 212021117233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021121298 and 212021121307.

It is not an unprimeable number, because it can be changed into a prime (212021120329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1013159 + ... + 1204380.

It is an arithmetic number, because the mean of its divisors is an integer number (27661593960).

Almost surely, 2^212021121329 is an apocalyptic number.

It is an amenable number.

212021121329 is a deficient number, since it is larger than the sum of its proper divisors (9271630351).

212021121329 is a wasteful number, since it uses less digits than its factorization.

212021121329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221719.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 212021121329 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, three hundred twenty-nine".