21121101101202 has 16 divisors (see below), whose sum is σ = 42426665970240. Its totient is φ = 7009623072432.

The previous prime is 21121101101179. The next prime is 21121101101203. The reversal of 21121101101202 is 20210110112112.

It is a happy number.

It is a super-2 number, since 2×21121101101202² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121101101203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7685988838 + ... + 7685991585.

It is an arithmetic number, because the mean of its divisors is an integer number (2651666623140).

Almost surely, 2^{21121101101202} is an apocalyptic number.

21121101101202 is an abundant number, since it is smaller than the sum of its proper divisors (21305564869038).

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

21121101101202 is a wasteful number, since it uses less digits than its factorization.

21121101101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15371980657.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21121101101202 its reverse (20210110112112), we get a palindrome (41331211213314).

The spelling of 21121101101202 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred one million, one hundred one thousand, two hundred two".