1020123051431 has 16 divisors (see below), whose sum is σ = 1117439994528. Its totient is φ = 923576304000.

The previous prime is 1020123051421. The next prime is 1020123051469. The reversal of 1020123051431 is 1341503210201.

1020123051431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020123051431 is a prime.

It is a super-2 number, since 2×1020123051431² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020123051397 and 1020123051406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020123051421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2698865 + ... + 3053541.

It is an arithmetic number, because the mean of its divisors is an integer number (69839999658).

Almost surely, 2^{1020123051431} is an apocalyptic number.

1020123051431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1020123051431 is a deficient number, since it is larger than the sum of its proper divisors (97316943097).

1020123051431 is a wasteful number, since it uses less digits than its factorization.

1020123051431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355762.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 1020123051431 its reverse (1341503210201), we get a palindrome (2361626261632).

The spelling of 1020123051431 in words is "one trillion, twenty billion, one hundred twenty-three million, fifty-one thousand, four hundred thirty-one".