20101220211002 has 12 divisors (see below), whose sum is σ = 35074578123450. Its totient is φ = 8614808661816.

The previous prime is 20101220210971. The next prime is 20101220211073. The reversal of 20101220211002 is 20011202210102.

It can be written as a sum of positive squares in only one way, i.e., 11022273840361 + 9078946370641 = 3319981^2 + 3013129^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

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 5 ways as a sum of consecutive naturals, for example, 102557245877 + ... + 102557246072.

Almost surely, 2^{20101220211002} is an apocalyptic number.

20101220211002 is a deficient number, since it is larger than the sum of its proper divisors (14973357912448).

20101220211002 is a wasteful number, since it uses less digits than its factorization.

20101220211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205114491965 (or 205114491958 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20101220211002 its reverse (20011202210102), we get a palindrome (40112422421104).

Subtracting from 20101220211002 its reverse (20011202210102), we obtain a square (90018000900 = 300030²).

The spelling of 20101220211002 in words is "twenty trillion, one hundred one billion, two hundred twenty million, two hundred eleven thousand, two".