20211220121002 has 8 divisors (see below), whose sum is σ = 30769320184416. Its totient is φ = 9954780059532.

The previous prime is 20211220120979. The next prime is 20211220121039. The reversal of 20211220121002 is 20012102211202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 75415000318 + ... + 75415000585.

It is an arithmetic number, because the mean of its divisors is an integer number (3846165023052).

Almost surely, 2^{20211220121002} is an apocalyptic number.

20211220121002 is a deficient number, since it is larger than the sum of its proper divisors (10558100063414).

20211220121002 is a wasteful number, since it uses less digits than its factorization.

20211220121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150830000972.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20211220121002 its reverse (20012102211202), we get a palindrome (40223322332204).

The spelling of 20211220121002 in words is "twenty trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, two".