1031421027155 has 12 divisors (see below), whose sum is σ = 1293858214320. Its totient is φ = 789261305712.

The previous prime is 1031421027079. The next prime is 1031421027157. The reversal of 1031421027155 is 5517201241301.

It is not a de Polignac number, because 1031421027155 - 2¹⁶ = 1031420961619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1031421027157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194972975 + ... + 194978264.

It is an arithmetic number, because the mean of its divisors is an integer number (107821517860).

Almost surely, 2^{1031421027155} is an apocalyptic number.

1031421027155 is a deficient number, since it is larger than the sum of its proper divisors (262437187165).

1031421027155 is an equidigital number, since it uses as much as digits as its factorization.

1031421027155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389951290 (or 389951267 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

Adding to 1031421027155 its reverse (5517201241301), we get a palindrome (6548622268456).

The spelling of 1031421027155 in words is "one trillion, thirty-one billion, four hundred twenty-one million, twenty-seven thousand, one hundred fifty-five".