20211212002 has 4 divisors (see below), whose sum is σ = 30316818006. Its totient is φ = 10105606000.

The previous prime is 20211211997. The next prime is 20211212003. The reversal of 20211212002 is 20021211202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13025428641 + 7185783361 = 114129^2 + 84769^2 .

It is not an unprimeable number, because it can be changed into a prime (20211212003) 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 as a sum of consecutive naturals, namely, 5052802999 + ... + 5052803002.

Almost surely, 2^20211212002 is an apocalyptic number.

20211212002 is a deficient number, since it is larger than the sum of its proper divisors (10105606004).

20211212002 is a wasteful number, since it uses less digits than its factorization.

20211212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105606003.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20211212002 its reverse (20021211202), we get a palindrome (40232423204).

The spelling of 20211212002 in words is "twenty billion, two hundred eleven million, two hundred twelve thousand, two".