1201226536155 has 16 divisors (see below), whose sum is σ = 1988237026080. Its totient is φ = 618562629888.

The previous prime is 1201226536099. The next prime is 1201226536171. The reversal of 1201226536155 is 5516356221021.

It is not a de Polignac number, because 1201226536155 - 2⁹ = 1201226535643 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1380719722 + ... + 1380720591.

It is an arithmetic number, because the mean of its divisors is an integer number (124264814130).

Almost surely, 2^{1201226536155} is an apocalyptic number.

1201226536155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1201226536155 is a deficient number, since it is larger than the sum of its proper divisors (787010489925).

1201226536155 is a wasteful number, since it uses less digits than its factorization.

1201226536155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761440350.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 1201226536155 in words is "one trillion, two hundred one billion, two hundred twenty-six million, five hundred thirty-six thousand, one hundred fifty-five".