20011001212102 has 4 divisors (see below), whose sum is σ = 30016501818156. Its totient is φ = 10005500606050.

The previous prime is 20011001212031. The next prime is 20011001212199. The reversal of 20011001212102 is 20121210011002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002750303024 + ... + 5002750303027.

It is an arithmetic number, because the mean of its divisors is an integer number (7504125454539).

Almost surely, 2^{20011001212102} is an apocalyptic number.

20011001212102 is a deficient number, since it is larger than the sum of its proper divisors (10005500606054).

20011001212102 is a wasteful number, since it uses less digits than its factorization.

20011001212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005500606053.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20011001212102 its reverse (20121210011002), we get a palindrome (40132211223104).

The spelling of 20011001212102 in words is "twenty trillion, eleven billion, one million, two hundred twelve thousand, one hundred two".