1203150521551 has 16 divisors (see below), whose sum is σ = 1360100730240. Its totient is φ = 1054257645280.

The previous prime is 1203150521533. The next prime is 1203150521563. The reversal of 1203150521551 is 1551250513021.

It is a cyclic number.

It is not a de Polignac number, because 1203150521551 - 2⁵ = 1203150521519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203150561551) 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, 3025381 + ... + 3399886.

It is an arithmetic number, because the mean of its divisors is an integer number (85006295640).

Almost surely, 2^{1203150521551} is an apocalyptic number.

1203150521551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1203150521551 is a deficient number, since it is larger than the sum of its proper divisors (156950208689).

1203150521551 is a wasteful number, since it uses less digits than its factorization.

1203150521551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6425894.

The product of its (nonzero) digits is 7500, while the sum is 31.

The spelling of 1203150521551 in words is "one trillion, two hundred three billion, one hundred fifty million, five hundred twenty-one thousand, five hundred fifty-one".