1210030013221 has 4 divisors (see below), whose sum is σ = 1210033710432. Its totient is φ = 1210026316012.

The previous prime is 1210030013209. The next prime is 1210030013233. The reversal of 1210030013221 is 1223100300121.

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 an interprime number because it is at equal distance from previous prime (1210030013209) and next prime (1210030013233).

It is a cyclic number.

It is not a de Polignac number, because 1210030013221 - 2²⁵ = 1209996458789 is a prime.

It is a super-2 number, since 2×1210030013221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210030013195 and 1210030013204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210030010221) 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, 1304251 + ... + 2030056.

It is an arithmetic number, because the mean of its divisors is an integer number (302508427608).

Almost surely, 2^{1210030013221} is an apocalyptic number.

It is an amenable number.

1210030013221 is a deficient number, since it is larger than the sum of its proper divisors (3697211).

1210030013221 is an equidigital number, since it uses as much as digits as its factorization.

1210030013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697210.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1210030013221 its reverse (1223100300121), we get a palindrome (2433130313342).

The spelling of 1210030013221 in words is "one trillion, two hundred ten billion, thirty million, thirteen thousand, two hundred twenty-one".