1031421120550 has 48 divisors (see below), whose sum is σ = 1980783828864. Its totient is φ = 399168000000.

The previous prime is 1031421120533. The next prime is 1031421120601. The reversal of 1031421120550 is 550211241301.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6871300 + ... + 7019800.

It is an arithmetic number, because the mean of its divisors is an integer number (41266329768).

Almost surely, 2^{1031421120550} is an apocalyptic number.

1031421120550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1031421120550 is a deficient number, since it is larger than the sum of its proper divisors (949362708314).

1031421120550 is a wasteful number, since it uses less digits than its factorization.

1031421120550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153025 (or 153020 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 1031421120550 its reverse (550211241301), we get a palindrome (1581632361851).

The spelling of 1031421120550 in words is "one trillion, thirty-one billion, four hundred twenty-one million, one hundred twenty thousand, five hundred fifty".