20211102102121 has 16 divisors (see below), whose sum is σ = 23138839607040. Its totient is φ = 17293486351680.

The previous prime is 20211102102073. The next prime is 20211102102173. The reversal of 20211102102121 is 12120120111202.

It is not a de Polignac number, because 20211102102121 - 2³¹ = 20208954618473 is a prime.

It is a super-2 number, since 2×20211102102121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211102102095 and 20211102102104.

It is not an unprimeable number, because it can be changed into a prime (20211102102181) 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, 19051140 + ... + 20084026.

It is an arithmetic number, because the mean of its divisors is an integer number (1446177475440).

Almost surely, 2^{20211102102121} is an apocalyptic number.

It is an amenable number.

20211102102121 is a deficient number, since it is larger than the sum of its proper divisors (2927737504919).

20211102102121 is a wasteful number, since it uses less digits than its factorization.

20211102102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037784.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20211102102121 its reverse (12120120111202), we get a palindrome (32331222213323).

The spelling of 20211102102121 in words is "twenty trillion, two hundred eleven billion, one hundred two million, one hundred two thousand, one hundred twenty-one".