1230121102221 has 32 divisors (see below), whose sum is σ = 2004504935040. Its totient is φ = 745527918960.

The previous prime is 1230121102211. The next prime is 1230121102241. The reversal of 1230121102221 is 1222011210321.

1230121102221 is a `hidden beast` number, since 1 + 230 + 1 + 211 + 0 + 2 + 221 = 666.

It is not a de Polignac number, because 1230121102221 - 2⁹ = 1230121101709 is a prime.

It is a super-2 number, since 2×1230121102221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1230121102194 and 1230121102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230121102211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17079030 + ... + 17150903.

It is an arithmetic number, because the mean of its divisors is an integer number (62640779220).

Almost surely, 2^{1230121102221} is an apocalyptic number.

1230121102221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1230121102221 is a deficient number, since it is larger than the sum of its proper divisors (774383832819).

1230121102221 is an equidigital number, since it uses as much as digits as its factorization.

1230121102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34229975 (or 34229947 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1230121102221 its reverse (1222011210321), we get a palindrome (2452132312542).

The spelling of 1230121102221 in words is "one trillion, two hundred thirty billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty-one".