20001212202102 has 64 divisors (see below), whose sum is σ = 42605402112000. Its totient is φ = 6241790315808.

The previous prime is 20001212202091. The next prime is 20001212202109. The reversal of 20001212202102 is 20120221210002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001212202109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3846349 + ... + 7402487.

It is an arithmetic number, because the mean of its divisors is an integer number (665709408000).

Almost surely, 2^{20001212202102} is an apocalyptic number.

20001212202102 is an abundant number, since it is smaller than the sum of its proper divisors (22604189909898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001212202102 is a wasteful number, since it uses less digits than its factorization.

20001212202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556745.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20001212202102 its reverse (20120221210002), we get a palindrome (40121433412104).

The spelling of 20001212202102 in words is "twenty trillion, one billion, two hundred twelve million, two hundred two thousand, one hundred two".