1211320023030 has 48 divisors (see below), whose sum is σ = 3391696067760. Its totient is φ = 298171082304.

The previous prime is 1211320023013. The next prime is 1211320023047. The reversal of 1211320023030 is 303200231121.

It is an interprime number because it is at equal distance from previous prime (1211320023013) and next prime (1211320023047).

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1211320022994 and 1211320023012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 517656960 + ... + 517659299.

It is an arithmetic number, because the mean of its divisors is an integer number (70660334745).

Almost surely, 2^{1211320023030} is an apocalyptic number.

1211320023030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211320023030 is an abundant number, since it is smaller than the sum of its proper divisors (2180376044730).

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

1211320023030 is a wasteful number, since it uses less digits than its factorization.

1211320023030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035316285 (or 1035316282 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1211320023030 its reverse (303200231121), we get a palindrome (1514520254151).

The spelling of 1211320023030 in words is "one trillion, two hundred eleven billion, three hundred twenty million, twenty-three thousand, thirty".