2121020103021 has 64 divisors (see below), whose sum is σ = 3094609432320. Its totient is φ = 1287096053760.

The previous prime is 2121020102983. The next prime is 2121020103029. The reversal of 2121020103021 is 1203010201212.

It is a de Polignac number, because none of the positive numbers 2^k-2121020103021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020103029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 116090275 + ... + 116108543.

It is an arithmetic number, because the mean of its divisors is an integer number (48353272380).

Almost surely, 2^{2121020103021} is an apocalyptic number.

It is an amenable number.

2121020103021 is a deficient number, since it is larger than the sum of its proper divisors (973589329299).

2121020103021 is a wasteful number, since it uses less digits than its factorization.

2121020103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18974.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 2121020103021 its reverse (1203010201212), we get a palindrome (3324030304233).

The spelling of 2121020103021 in words is "two trillion, one hundred twenty-one billion, twenty million, one hundred three thousand, twenty-one".