21000211020202 has 32 divisors (see below), whose sum is σ = 32703468940800. Its totient is φ = 10102969425600.

The previous prime is 21000211020143. The next prime is 21000211020203. The reversal of 21000211020202 is 20202011200012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21000211020203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68977552 + ... + 69281332.

It is an arithmetic number, because the mean of its divisors is an integer number (1021983404400).

Almost surely, 2^{21000211020202} is an apocalyptic number.

21000211020202 is a deficient number, since it is larger than the sum of its proper divisors (11703257920598).

21000211020202 is a wasteful number, since it uses less digits than its factorization.

21000211020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310222.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21000211020202 its reverse (20202011200012), we get a palindrome (41202222220214).

The spelling of 21000211020202 in words is "twenty-one trillion, two hundred eleven million, twenty thousand, two hundred two".