1212021020021 has 8 divisors (see below), whose sum is σ = 1387479350400. Its totient is φ = 1037140807248.

The previous prime is 1212021020003. The next prime is 1212021020083. The reversal of 1212021020021 is 1200201202121.

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

It is not a de Polignac number, because 1212021020021 - 2¹⁰ = 1212021018997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212021019978 and 1212021020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212021020521) 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, 144524906 + ... + 144533291.

It is an arithmetic number, because the mean of its divisors is an integer number (173434918800).

Almost surely, 2^{1212021020021} is an apocalyptic number.

It is an amenable number.

1212021020021 is a deficient number, since it is larger than the sum of its proper divisors (175458330379).

1212021020021 is an equidigital number, since it uses as much as digits as its factorization.

1212021020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289058803.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1212021020021 its reverse (1200201202121), we get a palindrome (2412222222142).

The spelling of 1212021020021 in words is "one trillion, two hundred twelve billion, twenty-one million, twenty thousand, twenty-one".