20002121206 has 8 divisors (see below), whose sum is σ = 30109955544. Its totient is φ = 9965469360.

The previous prime is 20002121203. The next prime is 20002121231. The reversal of 20002121206 is 60212120002.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20002121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002121203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17794920 + ... + 17796043.

It is an arithmetic number, because the mean of its divisors is an integer number (3763744443).

Almost surely, 2^20002121206 is an apocalyptic number.

20002121206 is a deficient number, since it is larger than the sum of its proper divisors (10107834338).

20002121206 is a wasteful number, since it uses less digits than its factorization.

20002121206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35591246.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20002121206 its reverse (60212120002), we get a palindrome (80214241208).

The spelling of 20002121206 in words is "twenty billion, two million, one hundred twenty-one thousand, two hundred six".