1031220230111 has 4 divisors (see below), whose sum is σ = 1031367912912. Its totient is φ = 1031072547312.

The previous prime is 1031220230101. The next prime is 1031220230113. The reversal of 1031220230111 is 1110320221301.

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 1031220230111 - 2²² = 1031216035807 is a prime.

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 1031220230111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031220230113) 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, 73830926 + ... + 73844891.

It is an arithmetic number, because the mean of its divisors is an integer number (257841978228).

Almost surely, 2^{1031220230111} is an apocalyptic number.

1031220230111 is a deficient number, since it is larger than the sum of its proper divisors (147682801).

1031220230111 is an equidigital number, since it uses as much as digits as its factorization.

1031220230111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147682800.

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

Adding to 1031220230111 its reverse (1110320221301), we get a palindrome (2141540451412).

The spelling of 1031220230111 in words is "one trillion, thirty-one billion, two hundred twenty million, two hundred thirty thousand, one hundred eleven".