20102101212121 has 16 divisors (see below), whose sum is σ = 21140454031488. Its totient is φ = 19077502787200.

The previous prime is 20102101212013. The next prime is 20102101212131. The reversal of 20102101212121 is 12121210120102.

It is a cyclic number.

It is not a de Polignac number, because 20102101212121 - 2¹³ = 20102101203929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102101212095 and 20102101212104.

It is not an unprimeable number, because it can be changed into a prime (20102101212131) 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, 14463885 + ... + 15792661.

It is an arithmetic number, because the mean of its divisors is an integer number (1321278376968).

Almost surely, 2^{20102101212121} is an apocalyptic number.

It is an amenable number.

20102101212121 is a deficient number, since it is larger than the sum of its proper divisors (1038352819367).

20102101212121 is a wasteful number, since it uses less digits than its factorization.

20102101212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333952.

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

Adding to 20102101212121 its reverse (12121210120102), we get a palindrome (32223311332223).

The spelling of 20102101212121 in words is "twenty trillion, one hundred two billion, one hundred one million, two hundred twelve thousand, one hundred twenty-one".