21011211002 has 32 divisors (see below), whose sum is σ = 32812274880. Its totient is φ = 10082661120.

The previous prime is 21011210963. The next prime is 21011211017. The reversal of 21011211002 is 20011211012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8145749 + ... + 8148327.

It is an arithmetic number, because the mean of its divisors is an integer number (1025383590).

Almost surely, 2^21011211002 is an apocalyptic number.

21011211002 is a deficient number, since it is larger than the sum of its proper divisors (11801063878).

21011211002 is a wasteful number, since it uses less digits than its factorization.

21011211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21011211002 its reverse (20011211012), we get a palindrome (41022422014).

The spelling of 21011211002 in words is "twenty-one billion, eleven million, two hundred eleven thousand, two".