2020102121121 has 32 divisors (see below), whose sum is σ = 3121925234688. Its totient is φ = 1137969497280.

The previous prime is 2020102121083. The next prime is 2020102121123. The reversal of 2020102121121 is 1211212010202.

It is not a de Polignac number, because 2020102121121 - 2⁶ = 2020102121057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2020102121121.

It is not an unprimeable number, because it can be changed into a prime (2020102121123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15751171 + ... + 15878903.

It is an arithmetic number, because the mean of its divisors is an integer number (97560163584).

Almost surely, 2^{2020102121121} is an apocalyptic number.

2020102121121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2020102121121 is a deficient number, since it is larger than the sum of its proper divisors (1101823113567).

2020102121121 is a wasteful number, since it uses less digits than its factorization.

2020102121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138421.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2020102121121 its reverse (1211212010202), we get a palindrome (3231314131323).

The spelling of 2020102121121 in words is "two trillion, twenty billion, one hundred two million, one hundred twenty-one thousand, one hundred twenty-one".