212021011021 has 8 divisors (see below), whose sum is σ = 222518160000. Its totient is φ = 201630432432.

The previous prime is 212021010989. The next prime is 212021011087. The reversal of 212021011021 is 120110120212.

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 212021011021 - 2⁵ = 212021010989 is a prime.

It is a super-2 number, since 2×212021011021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021010992 and 212021011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021011921) 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, 26638521 + ... + 26646478.

It is an arithmetic number, because the mean of its divisors is an integer number (27814770000).

Almost surely, 2^212021011021 is an apocalyptic number.

It is an amenable number.

212021011021 is a deficient number, since it is larger than the sum of its proper divisors (10497148979).

212021011021 is a wasteful number, since it uses less digits than its factorization.

212021011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53285195.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212021011021 its reverse (120110120212), we get a palindrome (332131131233).

The spelling of 212021011021 in words is "two hundred twelve billion, twenty-one million, eleven thousand, twenty-one".