212021023331 has 8 divisors (see below), whose sum is σ = 228463029984. Its totient is φ = 195597973440.

The previous prime is 212021023309. The next prime is 212021023399. The reversal of 212021023331 is 133320120212.

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 212021023331 - 2²² = 212016829027 is a prime.

It is a super-2 number, since 2×212021023331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021023531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4715951 + ... + 4760696.

It is an arithmetic number, because the mean of its divisors is an integer number (28557878748).

Almost surely, 2^212021023331 is an apocalyptic number.

212021023331 is a deficient number, since it is larger than the sum of its proper divisors (16442006653).

212021023331 is a wasteful number, since it uses less digits than its factorization.

212021023331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9478381.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 212021023331 its reverse (133320120212), we get a palindrome (345341143543).

The spelling of 212021023331 in words is "two hundred twelve billion, twenty-one million, twenty-three thousand, three hundred thirty-one".