1201132320021 has 32 divisors (see below), whose sum is σ = 1796203094400. Its totient is φ = 793221828480.

The previous prime is 1201132320019. The next prime is 1201132320071. The reversal of 1201132320021 is 1200232311021.

1201132320021 is a `hidden beast` number, since 120 + 1 + 1 + 323 + 200 + 21 = 666.

It is not a de Polignac number, because 1201132320021 - 2¹ = 1201132320019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201132319976 and 1201132320003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201132320071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13071166 + ... + 13162736.

It is an arithmetic number, because the mean of its divisors is an integer number (56131346700).

Almost surely, 2^{1201132320021} is an apocalyptic number.

It is an amenable number.

1201132320021 is a deficient number, since it is larger than the sum of its proper divisors (595070774379).

1201132320021 is a wasteful number, since it uses less digits than its factorization.

1201132320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96146 (or 96140 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1201132320021 its reverse (1200232311021), we get a palindrome (2401364631042).

The spelling of 1201132320021 in words is "one trillion, two hundred one billion, one hundred thirty-two million, three hundred twenty thousand, twenty-one".