20021100002212 has 24 divisors (see below), whose sum is σ = 37117685304504. Its totient is φ = 9416674509312.

The previous prime is 20021100002179. The next prime is 20021100002221. The reversal of 20021100002212 is 21220000112002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1935676733796 + 18085423268416 = 1391286^2 + 4252696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021100002192 and 20021100002201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78302823 + ... + 78558094.

It is an arithmetic number, because the mean of its divisors is an integer number (1546570221021).

Almost surely, 2^{20021100002212} is an apocalyptic number.

It is an amenable number.

20021100002212 is a deficient number, since it is larger than the sum of its proper divisors (17096585302292).

20021100002212 is a wasteful number, since it uses less digits than its factorization.

20021100002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156862815 (or 156862813 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021100002212 its reverse (21220000112002), we get a palindrome (41241100114214).

The spelling of 20021100002212 in words is "twenty trillion, twenty-one billion, one hundred million, two thousand, two hundred twelve".