1081909942201 has 9 divisors (see below), whose sum is σ = 1189219372453. Its totient is φ = 983544091420.

The previous prime is 1081909942133. The next prime is 1081909942207. The reversal of 1081909942201 is 1022499091801.

The square root of 1081909942201 is 1040149.

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

It is not a de Polignac number, because 1081909942201 - 2¹³ = 1081909934009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081909942207) 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, 11394360 + ... + 11488918.

Almost surely, 2^{1081909942201} is an apocalyptic number.

1081909942201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1081909942201 is the 1040149-th square number.

1081909942201 is the 520075-th centered octagonal number.

It is an amenable number.

1081909942201 is a deficient number, since it is larger than the sum of its proper divisors (107309430252).

1081909942201 is an frugal number, since it uses more digits than its factorization.

1081909942201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189140 (or 94570 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 46.

The spelling of 1081909942201 in words is "one trillion, eighty-one billion, nine hundred nine million, nine hundred forty-two thousand, two hundred one".