1001212022121 has 4 divisors (see below), whose sum is σ = 1334949362832. Its totient is φ = 667474681412.

The previous prime is 1001212022089. The next prime is 1001212022147. The reversal of 1001212022121 is 1212202121001.

1001212022121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1001212022121 - 2⁵ = 1001212022089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001212022121.

It is not an unprimeable number, because it can be changed into a prime (1001212022521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166868670351 + ... + 166868670356.

It is an arithmetic number, because the mean of its divisors is an integer number (333737340708).

Almost surely, 2^{1001212022121} is an apocalyptic number.

It is an amenable number.

1001212022121 is a deficient number, since it is larger than the sum of its proper divisors (333737340711).

1001212022121 is an equidigital number, since it uses as much as digits as its factorization.

1001212022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333737340710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1001212022121 its reverse (1212202121001), we get a palindrome (2213414143122).

The spelling of 1001212022121 in words is "one trillion, one billion, two hundred twelve million, twenty-two thousand, one hundred twenty-one".