1021212210021 has 8 divisors (see below), whose sum is σ = 1361638192224. Its totient is φ = 680797183920.

The previous prime is 1021212209999. The next prime is 1021212210047. The reversal of 1021212210021 is 1200122121201.

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

It is not a de Polignac number, because 1021212210021 - 2²¹ = 1021210112869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021212210091) 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, 2519011 + ... + 2896176.

It is an arithmetic number, because the mean of its divisors is an integer number (170204774028).

Almost surely, 2^{1021212210021} is an apocalyptic number.

It is an amenable number.

1021212210021 is a deficient number, since it is larger than the sum of its proper divisors (340425982203).

1021212210021 is an equidigital number, since it uses as much as digits as its factorization.

1021212210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478051.

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

Adding to 1021212210021 its reverse (1200122121201), we get a palindrome (2221334331222).

The spelling of 1021212210021 in words is "one trillion, twenty-one billion, two hundred twelve million, two hundred ten thousand, twenty-one".