20121332229 has 20 divisors (see below), whose sum is σ = 30106426240. Its totient is φ = 13392517320.

The previous prime is 20121332227. The next prime is 20121332299. The reversal of 20121332229 is 92223312102.

It is not a de Polignac number, because 20121332229 - 2¹ = 20121332227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121332227) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 150517 + ... + 250794.

It is an arithmetic number, because the mean of its divisors is an integer number (1505321312).

Almost surely, 2^20121332229 is an apocalyptic number.

It is an amenable number.

20121332229 is a deficient number, since it is larger than the sum of its proper divisors (9985094011).

20121332229 is an equidigital number, since it uses as much as digits as its factorization.

20121332229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401942 (or 401933 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 20121332229 in words is "twenty billion, one hundred twenty-one million, three hundred thirty-two thousand, two hundred twenty-nine".