1211210221030 has 16 divisors (see below), whose sum is σ = 2294924629680. Its totient is φ = 458984925792.

The previous prime is 1211210221019. The next prime is 1211210221061. The reversal of 1211210221030 is 301220121121.

It is a junction number, because it is equal to n+sod(n) for n = 1211210220995 and 1211210221013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3187395129 + ... + 3187395508.

It is an arithmetic number, because the mean of its divisors is an integer number (143432789355).

Almost surely, 2^{1211210221030} is an apocalyptic number.

1211210221030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211210221030 is a deficient number, since it is larger than the sum of its proper divisors (1083714408650).

1211210221030 is a wasteful number, since it uses less digits than its factorization.

1211210221030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6374790663.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1211210221030 its reverse (301220121121), we get a palindrome (1512430342151).

Subtracting from 1211210221030 its reverse (301220121121), we obtain a palindrome (909990099909).

The spelling of 1211210221030 in words is "one trillion, two hundred eleven billion, two hundred ten million, two hundred twenty-one thousand, thirty".