105142021240 has 16 divisors (see below), whose sum is σ = 236569547880. Its totient is φ = 42056808480.

The previous prime is 105142021223. The next prime is 105142021247. The reversal of 105142021240 is 42120241501.

It is a super-2 number, since 2×105142021240² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105142021247) 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, 1314275226 + ... + 1314275305.

Almost surely, 2^105142021240 is an apocalyptic number.

105142021240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105142021240 is an abundant number, since it is smaller than the sum of its proper divisors (131427526640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105142021240 is a wasteful number, since it uses less digits than its factorization.

105142021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628550542 (or 2628550538 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 105142021240 its reverse (42120241501), we get a palindrome (147262262741).

The spelling of 105142021240 in words is "one hundred five billion, one hundred forty-two million, twenty-one thousand, two hundred forty".