21002011101210 has 16 divisors (see below), whose sum is σ = 50404826642976. Its totient is φ = 5600536293648.

The previous prime is 21002011101193. The next prime is 21002011101271. The reversal of 21002011101210 is 1210111020012.

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, 350033518324 + ... + 350033518383.

It is an arithmetic number, because the mean of its divisors is an integer number (3150301665186).

Almost surely, 2^{21002011101210} is an apocalyptic number.

21002011101210 is an abundant number, since it is smaller than the sum of its proper divisors (29402815541766).

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

21002011101210 is a wasteful number, since it uses less digits than its factorization.

21002011101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700067036717.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21002011101210 its reverse (1210111020012), we get a palindrome (22212122121222).

The spelling of 21002011101210 in words is "twenty-one trillion, two billion, eleven million, one hundred one thousand, two hundred ten".