1231030120211 has 8 divisors (see below), whose sum is σ = 1303484541984. Its totient is φ = 1158580241280.

The previous prime is 1231030120207. The next prime is 1231030120217. The reversal of 1231030120211 is 1120210301321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231030120211 - 2² = 1231030120207 is a prime.

It is a super-2 number, since 2×1231030120211² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231030120211.

It is not an unprimeable number, because it can be changed into a prime (1231030120217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569735 + ... + 1669328.

It is an arithmetic number, because the mean of its divisors is an integer number (162935567748).

Almost surely, 2^{1231030120211} is an apocalyptic number.

1231030120211 is a deficient number, since it is larger than the sum of its proper divisors (72454421773).

1231030120211 is a wasteful number, since it uses less digits than its factorization.

1231030120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271421.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1231030120211 its reverse (1120210301321), we get a palindrome (2351240421532).

The spelling of 1231030120211 in words is "one trillion, two hundred thirty-one billion, thirty million, one hundred twenty thousand, two hundred eleven".