1001022012121 has 12 divisors (see below), whose sum is σ = 1058244264000. Its totient is φ = 946753238808.

The previous prime is 1001022012103. The next prime is 1001022012143. The reversal of 1001022012121 is 1212102201001.

It is not a de Polignac number, because 1001022012121 - 2¹⁷ = 1001021881049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001022012191) 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, 2098381 + ... + 2530858.

It is an arithmetic number, because the mean of its divisors is an integer number (88187022000).

Almost surely, 2^{1001022012121} is an apocalyptic number.

It is an amenable number.

1001022012121 is a deficient number, since it is larger than the sum of its proper divisors (57222251879).

1001022012121 is an equidigital number, since it uses as much as digits as its factorization.

1001022012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629876 (or 4629857 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1001022012121 its reverse (1212102201001), we get a palindrome (2213124213122).

The spelling of 1001022012121 in words is "one trillion, one billion, twenty-two million, twelve thousand, one hundred twenty-one".