1211321310030 has 96 divisors (see below), whose sum is σ = 3394128628800. Its totient is φ = 297957864960.

The previous prime is 1211321310011. The next prime is 1211321310071. The reversal of 1211321310030 is 300131231121.

1211321310030 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 321 + 310 + 0 + 30 = 666.

It is a super-2 number, since 2×1211321310030² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1211321309985 and 1211321310012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1266810 + ... + 2006850.

It is an arithmetic number, because the mean of its divisors is an integer number (35355506550).

Almost surely, 2^{1211321310030} is an apocalyptic number.

1211321310030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211321310030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697064314400).

1211321310030 is an abundant number, since it is smaller than the sum of its proper divisors (2182807318770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211321310030 is a wasteful number, since it uses less digits than its factorization.

1211321310030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741466 (or 741463 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1211321310030 its reverse (300131231121), we get a palindrome (1511452541151).

The spelling of 1211321310030 in words is "one trillion, two hundred eleven billion, three hundred twenty-one million, three hundred ten thousand, thirty".