1020212122021 has 4 divisors (see below), whose sum is σ = 1020334619500. Its totient is φ = 1020089624544.

The previous prime is 1020212121997. The next prime is 1020212122031. The reversal of 1020212122021 is 1202212120201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 276286896900 + 743925225121 = 525630^2 + 862511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020212122021 - 2¹³ = 1020212113829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020212121986 and 1020212122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020212122031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61236246 + ... + 61252903.

It is an arithmetic number, because the mean of its divisors is an integer number (255083654875).

Almost surely, 2^{1020212122021} is an apocalyptic number.

It is an amenable number.

1020212122021 is a deficient number, since it is larger than the sum of its proper divisors (122497479).

1020212122021 is an equidigital number, since it uses as much as digits as its factorization.

1020212122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122497478.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1020212122021 its reverse (1202212120201), we get a palindrome (2222424242222).

The spelling of 1020212122021 in words is "one trillion, twenty billion, two hundred twelve million, one hundred twenty-two thousand, twenty-one".