1021210212021 has 8 divisors (see below), whose sum is σ = 1381936207584. Its totient is φ = 670645512240.

The previous prime is 1021210212017. The next prime is 1021210212067. The reversal of 1021210212021 is 1202120121201.

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

It is not a de Polignac number, because 1021210212021 - 2² = 1021210212017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021210212721) 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, 2540323710 + ... + 2540324111.

It is an arithmetic number, because the mean of its divisors is an integer number (172742025948).

Almost surely, 2^{1021210212021} is an apocalyptic number.

It is an amenable number.

1021210212021 is a deficient number, since it is larger than the sum of its proper divisors (360725995563).

1021210212021 is an equidigital number, since it uses as much as digits as its factorization.

1021210212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080647891.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021210212021 its reverse (1202120121201), we get a palindrome (2223330333222).

The spelling of 1021210212021 in words is "one trillion, twenty-one billion, two hundred ten million, two hundred twelve thousand, twenty-one".