1211231123010 has 48 divisors (see below), whose sum is σ = 3250788053760. Its totient is φ = 312575772960.

The previous prime is 1211231122967. The next prime is 1211231123051. The reversal of 1211231123010 is 103211321121.

1211231123010 is a `hidden beast` number, since 1 + 2 + 112 + 311 + 230 + 10 = 666.

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

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, 217063720 + ... + 217069299.

It is an arithmetic number, because the mean of its divisors is an integer number (67724751120).

Almost surely, 2^{1211231123010} is an apocalyptic number.

1211231123010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211231123010 is an abundant number, since it is smaller than the sum of its proper divisors (2039556930750).

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

1211231123010 is a wasteful number, since it uses less digits than its factorization.

1211231123010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434133063 (or 434133060 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1211231123010 its reverse (103211321121), we get a palindrome (1314442444131).

The spelling of 1211231123010 in words is "one trillion, two hundred eleven billion, two hundred thirty-one million, one hundred twenty-three thousand, ten".