21011210020012 has 12 divisors (see below), whose sum is σ = 38704860563320. Its totient is φ = 9952678430496.

The previous prime is 21011210019977. The next prime is 21011210020037. The reversal of 21011210020012 is 21002001211012.

It is a junction number, because it is equal to n+sod(n) for n = 21011210019974 and 21011210020001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138231644793 + ... + 138231644944.

Almost surely, 2^{21011210020012} is an apocalyptic number.

It is an amenable number.

21011210020012 is a deficient number, since it is larger than the sum of its proper divisors (17693650543308).

21011210020012 is a wasteful number, since it uses less digits than its factorization.

21011210020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276463289760 (or 276463289758 counting only the distinct ones).

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

Adding to 21011210020012 its reverse (21002001211012), we get a palindrome (42013211231024).

The spelling of 21011210020012 in words is "twenty-one trillion, eleven billion, two hundred ten million, twenty thousand, twelve".