212021121129 has 8 divisors (see below), whose sum is σ = 282787557600. Its totient is φ = 141301049376.

The previous prime is 212021121107. The next prime is 212021121131. The reversal of 212021121129 is 921121120212.

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

It is not a de Polignac number, because 212021121129 - 2⁵ = 212021121097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212021121099 and 212021121108.

It is not an unprimeable number, because it can be changed into a prime (212021121139) 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, 11580507 + ... + 11598800.

It is an arithmetic number, because the mean of its divisors is an integer number (35348444700).

Almost surely, 2^212021121129 is an apocalyptic number.

It is an amenable number.

212021121129 is a deficient number, since it is larger than the sum of its proper divisors (70766436471).

212021121129 is a wasteful number, since it uses less digits than its factorization.

212021121129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23182359.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 212021121129 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-nine".