20002121000002 has 32 divisors (see below), whose sum is σ = 31036238649072. Its totient is φ = 9663579254784.

The previous prime is 20002120999979. The next prime is 20002121000033. The reversal of 20002121000002 is 20000012120002.

It can be written as a sum of positive squares in 8 ways, for example, as 4092241739041 + 15909879260961 = 2022929^2 + 3988719^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3437623 + ... + 7198714.

Almost surely, 2^{20002121000002} is an apocalyptic number.

20002121000002 is a deficient number, since it is larger than the sum of its proper divisors (11034117649070).

20002121000002 is a wasteful number, since it uses less digits than its factorization.

20002121000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10636662.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20002121000002 its reverse (20000012120002), we get a palindrome (40002133120004).

The spelling of 20002121000002 in words is "twenty trillion, two billion, one hundred twenty-one million, two", and thus it is an aban number.