20211311121102 has 24 divisors (see below), whose sum is σ = 43805019041784. Its totient is φ = 6734973715344.

The previous prime is 20211311121047. The next prime is 20211311121137. The reversal of 20211311121102 is 20112111311202.

It is a happy number.

20211311121102 is a `hidden beast` number, since 20 + 211 + 311 + 1 + 21 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177440793 + ... + 177554660.

It is an arithmetic number, because the mean of its divisors is an integer number (1825209126741).

Almost surely, 2^{20211311121102} is an apocalyptic number.

20211311121102 is an abundant number, since it is smaller than the sum of its proper divisors (23593707920682).

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

20211311121102 is a wasteful number, since it uses less digits than its factorization.

20211311121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354998624 (or 354998621 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 20211311121102 its reverse (20112111311202), we get a palindrome (40323422432304).

The spelling of 20211311121102 in words is "twenty trillion, two hundred eleven billion, three hundred eleven million, one hundred twenty-one thousand, one hundred two".