21100211011012 has 24 divisors (see below), whose sum is σ = 42222881106560. Its totient is φ = 9038134915200.

The previous prime is 21100211010971. The next prime is 21100211011057. The reversal of 21100211011012 is 21011011200112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21100211010983 and 21100211011001.

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, 200473989 + ... + 200579212.

Almost surely, 2^{21100211011012} is an apocalyptic number.

It is an amenable number.

21100211011012 is an abundant number, since it is smaller than the sum of its proper divisors (21122670095548).

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

21100211011012 is a wasteful number, since it uses less digits than its factorization.

21100211011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401055091 (or 401055089 counting only the distinct ones).

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

Adding to 21100211011012 its reverse (21011011200112), we get a palindrome (42111222211124).

The spelling of 21100211011012 in words is "twenty-one trillion, one hundred billion, two hundred eleven million, eleven thousand, twelve".