1231012240211 has 4 divisors (see below), whose sum is σ = 1325705489472. Its totient is φ = 1136318990952.

The previous prime is 1231012240207. The next prime is 1231012240217. The reversal of 1231012240211 is 1120422101321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1231012240211 - 2² = 1231012240207 is a prime.

It is a super-2 number, since 2×1231012240211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231012240217) 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, 47346624611 + ... + 47346624636.

It is an arithmetic number, because the mean of its divisors is an integer number (331426372368).

Almost surely, 2^{1231012240211} is an apocalyptic number.

1231012240211 is a deficient number, since it is larger than the sum of its proper divisors (94693249261).

1231012240211 is an equidigital number, since it uses as much as digits as its factorization.

1231012240211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94693249260.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1231012240211 its reverse (1120422101321), we get a palindrome (2351434341532).

The spelling of 1231012240211 in words is "one trillion, two hundred thirty-one billion, twelve million, two hundred forty thousand, two hundred eleven".