1002122121121 has 12 divisors (see below), whose sum is σ = 1101628506832. Its totient is φ = 910918899000.

The previous prime is 1002122121109. The next prime is 1002122121131. The reversal of 1002122121121 is 1211212212001.

It is not a de Polignac number, because 1002122121121 - 2²¹ = 1002120023969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002122121095 and 1002122121104.

It is not an unprimeable number, because it can be changed into a prime (1002122121131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 644506 + ... + 1555516.

Almost surely, 2^{1002122121121} is an apocalyptic number.

1002122121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002122121121 is a deficient number, since it is larger than the sum of its proper divisors (99506385711).

1002122121121 is an equidigital number, since it uses as much as digits as its factorization.

1002122121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920124 (or 920113 counting only the distinct ones).

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

Adding to 1002122121121 its reverse (1211212212001), we get a palindrome (2213334333122).

The spelling of 1002122121121 in words is "one trillion, two billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".