3212121201021 has 24 divisors (see below), whose sum is σ = 4759590332640. Its totient is φ = 2086345156896.

The previous prime is 3212121201007. The next prime is 3212121201071. The reversal of 3212121201021 is 1201021212123.

3212121201021 is a `hidden beast` number, since 321 + 2 + 121 + 201 + 0 + 21 = 666.

It is not a de Polignac number, because 3212121201021 - 2⁵ = 3212121200989 is a prime.

It is a super-2 number, since 2×3212121201021² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3212121200985 and 3212121201003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3212121201071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10299831 + ... + 10607108.

It is an arithmetic number, because the mean of its divisors is an integer number (198316263860).

Almost surely, 2^{3212121201021} is an apocalyptic number.

It is an amenable number.

3212121201021 is a deficient number, since it is larger than the sum of its proper divisors (1547469131619).

3212121201021 is a wasteful number, since it uses less digits than its factorization.

3212121201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20907385 (or 20907382 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 3212121201021 its reverse (1201021212123), we get a palindrome (4413142413144).

The spelling of 3212121201021 in words is "three trillion, two hundred twelve billion, one hundred twenty-one million, two hundred one thousand, twenty-one".