10221220102121 has 4 divisors (see below), whose sum is σ = 11681394402432. Its totient is φ = 8761045801812.

The previous prime is 10221220102073. The next prime is 10221220102211. The reversal of 10221220102121 is 12120102212201.

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 a de Polignac number, because none of the positive numbers 2^k-10221220102121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10221220102121.

It is not an unprimeable number, because it can be changed into a prime (10221220102021) 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, 730087150145 + ... + 730087150158.

It is an arithmetic number, because the mean of its divisors is an integer number (2920348600608).

Almost surely, 2^{10221220102121} is an apocalyptic number.

It is an amenable number.

10221220102121 is a deficient number, since it is larger than the sum of its proper divisors (1460174300311).

10221220102121 is an equidigital number, since it uses as much as digits as its factorization.

10221220102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460174300310.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10221220102121 its reverse (12120102212201), we get a palindrome (22341322314322).

The spelling of 10221220102121 in words is "ten trillion, two hundred twenty-one billion, two hundred twenty million, one hundred two thousand, one hundred twenty-one".