20211212232 has 32 divisors (see below), whose sum is σ = 56142256800. Its totient is φ = 6737070672.

The previous prime is 20211212227. The next prime is 20211212239. The reversal of 20211212232 is 23221211202.

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

It is not an unprimeable number, because it can be changed into a prime (20211212239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46784998 + ... + 46785429.

It is an arithmetic number, because the mean of its divisors is an integer number (1754445525).

Almost surely, 2^20211212232 is an apocalyptic number.

It is an amenable number.

20211212232 is an abundant number, since it is smaller than the sum of its proper divisors (35931044568).

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

20211212232 is a wasteful number, since it uses less digits than its factorization.

20211212232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93570442 (or 93570432 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20211212232 its reverse (23221211202), we get a palindrome (43432423434).

The spelling of 20211212232 in words is "twenty billion, two hundred eleven million, two hundred twelve thousand, two hundred thirty-two".