1021012212121 has 8 divisors (see below), whose sum is σ = 1140998126688. Its totient is φ = 905554068000.

The previous prime is 1021012212071. The next prime is 1021012212151. The reversal of 1021012212121 is 1212122101201.

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 1021012212121 - 2¹⁷ = 1021012081049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021012212095 and 1021012212104.

It is not an unprimeable number, because it can be changed into a prime (1021012212151) 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, 1131942135 + ... + 1131943036.

It is an arithmetic number, because the mean of its divisors is an integer number (142624765836).

Almost surely, 2^{1021012212121} is an apocalyptic number.

1021012212121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021012212121 is a deficient number, since it is larger than the sum of its proper divisors (119985914567).

1021012212121 is a wasteful number, since it uses less digits than its factorization.

1021012212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263885223.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1021012212121 its reverse (1212122101201), we get a palindrome (2233134313322).

The spelling of 1021012212121 in words is "one trillion, twenty-one billion, twelve million, two hundred twelve thousand, one hundred twenty-one".