1201501045500 has 384 divisors, whose sum is σ = 4149460224000. Its totient is φ = 269967264000.

The previous prime is 1201501045487. The next prime is 1201501045517. The reversal of 1201501045500 is 55401051021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 30335710 + ... + 30375290.

It is an arithmetic number, because the mean of its divisors is an integer number (10805886000).

Almost surely, 2^{1201501045500} is an apocalyptic number.

1201501045500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201501045500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074730112000).

1201501045500 is an abundant number, since it is smaller than the sum of its proper divisors (2947959178500).

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

1201501045500 is a wasteful number, since it uses less digits than its factorization.

1201501045500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39683 (or 39657 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 1201501045500 its reverse (55401051021), we get a palindrome (1256902096521).

The spelling of 1201501045500 in words is "one trillion, two hundred one billion, five hundred one million, forty-five thousand, five hundred".