1011002222121 has 4 divisors (see below), whose sum is σ = 1348002962832. Its totient is φ = 674001481412.

The previous prime is 1011002222101. The next prime is 1011002222143. The reversal of 1011002222121 is 1212222001101.

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 1011002222121 - 2⁹ = 1011002221609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011002222121.

It is not an unprimeable number, because it can be changed into a prime (1011002222101) 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, 168500370351 + ... + 168500370356.

It is an arithmetic number, because the mean of its divisors is an integer number (337000740708).

Almost surely, 2^{1011002222121} is an apocalyptic number.

It is an amenable number.

1011002222121 is a deficient number, since it is larger than the sum of its proper divisors (337000740711).

1011002222121 is an equidigital number, since it uses as much as digits as its factorization.

1011002222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337000740710.

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

Adding to 1011002222121 its reverse (1212222001101), we get a palindrome (2223224223222).

The spelling of 1011002222121 in words is "one trillion, eleven billion, two million, two hundred twenty-two thousand, one hundred twenty-one".