1020020212121 has 8 divisors (see below), whose sum is σ = 1030154441088. Its totient is φ = 1009886670000.

The previous prime is 1020020212103. The next prime is 1020020212139. The reversal of 1020020212121 is 1212120200201.

It is an interprime number because it is at equal distance from previous prime (1020020212103) and next prime (1020020212139).

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

It is a cyclic number.

It is not a de Polignac number, because 1020020212121 - 2²² = 1020016017817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020020212096 and 1020020212105.

It is not an unprimeable number, because it can be changed into a prime (1020020212151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3126176 + ... + 3437006.

It is an arithmetic number, because the mean of its divisors is an integer number (128769305136).

Almost surely, 2^{1020020212121} is an apocalyptic number.

It is an amenable number.

1020020212121 is a deficient number, since it is larger than the sum of its proper divisors (10134228967).

1020020212121 is a wasteful number, since it uses less digits than its factorization.

1020020212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343423.

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

Adding to 1020020212121 its reverse (1212120200201), we get a palindrome (2232140412322).

The spelling of 1020020212121 in words is "one trillion, twenty billion, twenty million, two hundred twelve thousand, one hundred twenty-one".