21011220100202 has 8 divisors (see below), whose sum is σ = 31517308404576. Its totient is φ = 10505450632012.

The previous prime is 21011220100151. The next prime is 21011220100301. The reversal of 21011220100202 is 20200102211012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79544228 + ... + 79807935.

It is an arithmetic number, because the mean of its divisors is an integer number (3939663550572).

Almost surely, 2^{21011220100202} is an apocalyptic number.

21011220100202 is a deficient number, since it is larger than the sum of its proper divisors (10506088304374).

21011220100202 is a wasteful number, since it uses less digits than its factorization.

21011220100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159418092.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21011220100202 its reverse (20200102211012), we get a palindrome (41211322311214).

The spelling of 21011220100202 in words is "twenty-one trillion, eleven billion, two hundred twenty million, one hundred thousand, two hundred two".