201230121132 has 36 divisors (see below), whose sum is σ = 508709270160. Its totient is φ = 67070872992.

The previous prime is 201230121119. The next prime is 201230121179. The reversal of 201230121132 is 231121032102.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×201230121132² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186994 + ... + 661382.

It is an arithmetic number, because the mean of its divisors is an integer number (14130813060).

Almost surely, 2^201230121132 is an apocalyptic number.

It is an amenable number.

201230121132 is an abundant number, since it is smaller than the sum of its proper divisors (307479149028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201230121132 is a wasteful number, since it uses less digits than its factorization.

201230121132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486182 (or 486177 counting only the distinct ones).

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

Adding to 201230121132 its reverse (231121032102), we get a palindrome (432351153234).

The spelling of 201230121132 in words is "two hundred one billion, two hundred thirty million, one hundred twenty-one thousand, one hundred thirty-two".