21121001202202 has 16 divisors (see below), whose sum is σ = 34574084105472. Its totient is φ = 9596997932320.

The previous prime is 21121001202187. The next prime is 21121001202209. The reversal of 21121001202202 is 20220210012112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21121001202209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172795498 + ... + 172917685.

It is an arithmetic number, because the mean of its divisors is an integer number (2160880256592).

Almost surely, 2^{21121001202202} is an apocalyptic number.

21121001202202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121001202202 is a deficient number, since it is larger than the sum of its proper divisors (13453082903270).

21121001202202 is a wasteful number, since it uses less digits than its factorization.

21121001202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345715973.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21121001202202 its reverse (20220210012112), we get a palindrome (41341211214314).

The spelling of 21121001202202 in words is "twenty-one trillion, one hundred twenty-one billion, one million, two hundred two thousand, two hundred two".