1121902521601 has 9 divisors (see below), whose sum is σ = 1153083996099. Its totient is φ = 1091542700664.

The previous prime is 1121902521577. The next prime is 1121902521611. The reversal of 1121902521601 is 1061252091211.

The square root of 1121902521601 is 1059199.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1003893783025 + 118008738576 = 1001945^2 + 343524^2 .

It is not a de Polignac number, because 1121902521601 - 2¹⁹ = 1121901997313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121902521611) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39176050 + ... + 39204676.

It is an arithmetic number, because the mean of its divisors is an integer number (128120444011).

Almost surely, 2^{1121902521601} is an apocalyptic number.

1121902521601 is the 1059199-th square number.

1121902521601 is the 529600-th centered octagonal number.

It is an amenable number.

1121902521601 is a deficient number, since it is larger than the sum of its proper divisors (31181474498).

1121902521601 is an frugal number, since it uses more digits than its factorization.

1121902521601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57328 (or 28664 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 31.

The spelling of 1121902521601 in words is "one trillion, one hundred twenty-one billion, nine hundred two million, five hundred twenty-one thousand, six hundred one".