1020111131231 has 8 divisors (see below), whose sum is σ = 1032437837424. Its totient is φ = 1007785287360.

The previous prime is 1020111131209. The next prime is 1020111131243. The reversal of 1020111131231 is 1321311110201.

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 1020111131231 - 2⁶ = 1020111131167 is a prime.

It is a super-2 number, since 2×1020111131231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020111131531) 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, 2347661 + ... + 2748041.

It is an arithmetic number, because the mean of its divisors is an integer number (129054729678).

Almost surely, 2^{1020111131231} is an apocalyptic number.

1020111131231 is a deficient number, since it is larger than the sum of its proper divisors (12326706193).

1020111131231 is an equidigital number, since it uses as much as digits as its factorization.

1020111131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431161.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1020111131231 its reverse (1321311110201), we get a palindrome (2341422241432).

The spelling of 1020111131231 in words is "one trillion, twenty billion, one hundred eleven million, one hundred thirty-one thousand, two hundred thirty-one".