21021101011012 has 12 divisors (see below), whose sum is σ = 36830053301356. Its totient is φ = 10498228639200.

The previous prime is 21021101010989. The next prime is 21021101011019. The reversal of 21021101011012 is 21011010112012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8573921871876 + 12447179139136 = 2928126^2 + 3528056^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21021101010983 and 21021101011001.

It is not an unprimeable number, because it can be changed into a prime (21021101011019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3080462739 + ... + 3080469562.

Almost surely, 2^{21021101011012} is an apocalyptic number.

It is an amenable number.

21021101011012 is a deficient number, since it is larger than the sum of its proper divisors (15808952290344).

21021101011012 is a wasteful number, since it uses less digits than its factorization.

21021101011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160933158 (or 6160933156 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21021101011012 its reverse (21011010112012), we get a palindrome (42032111123024).

The spelling of 21021101011012 in words is "twenty-one trillion, twenty-one billion, one hundred one million, eleven thousand, twelve".