21012111211002 has 16 divisors (see below), whose sum is σ = 42031441908192. Its totient is φ = 7002833822640.

The previous prime is 21012111210983. The next prime is 21012111211031. The reversal of 21012111211002 is 20011211121012.

It is a happy number.

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, 300774088 + ... + 300843939.

It is an arithmetic number, because the mean of its divisors is an integer number (2626965119262).

Almost surely, 2^{21012111211002} is an apocalyptic number.

21012111211002 is an abundant number, since it is smaller than the sum of its proper divisors (21019330697190).

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

21012111211002 is a wasteful number, since it uses less digits than its factorization.

21012111211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601623853.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21012111211002 its reverse (20011211121012), we get a palindrome (41023322332014).

The spelling of 21012111211002 in words is "twenty-one trillion, twelve billion, one hundred eleven million, two hundred eleven thousand, two".