2221002010121 has 8 divisors (see below), whose sum is σ = 2223221351880. Its totient is φ = 2218783012992.

The previous prime is 2221002010109. The next prime is 2221002010133. The reversal of 2221002010121 is 1210102001222.

It is an interprime number because it is at equal distance from previous prime (2221002010109) and next prime (2221002010133).

It can be written as a sum of positive squares in 4 ways, for example, as 1928109982096 + 292892028025 = 1388564^2 + 541195^2 .

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 2221002010121 - 2¹⁰ = 2221002009097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2221002010096 and 2221002010105.

It is not an unprimeable number, because it can be changed into a prime (2221002010151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13942901 + ... + 14101293.

It is an arithmetic number, because the mean of its divisors is an integer number (277902668985).

Almost surely, 2^{2221002010121} is an apocalyptic number.

It is an amenable number.

2221002010121 is a deficient number, since it is larger than the sum of its proper divisors (2219341759).

2221002010121 is a wasteful number, since it uses less digits than its factorization.

2221002010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172315.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2221002010121 its reverse (1210102001222), we get a palindrome (3431104011343).

The spelling of 2221002010121 in words is "two trillion, two hundred twenty-one billion, two million, ten thousand, one hundred twenty-one".