2121020220231 has 16 divisors (see below), whose sum is σ = 3427911467520. Its totient is φ = 1285466799960.

The previous prime is 2121020220203. The next prime is 2121020220283. The reversal of 2121020220231 is 1320220201212.

2121020220231 is a `hidden beast` number, since 2 + 1 + 210 + 2 + 0 + 220 + 231 = 666.

It is not a de Polignac number, because 2121020220231 - 2¹¹ = 2121020218183 is a prime.

It is a super-2 number, since 2×2121020220231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020220331) 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, 3570740815 + ... + 3570741408.

It is an arithmetic number, because the mean of its divisors is an integer number (214244466720).

Almost surely, 2^{2121020220231} is an apocalyptic number.

2121020220231 is a deficient number, since it is larger than the sum of its proper divisors (1306891247289).

2121020220231 is a wasteful number, since it uses less digits than its factorization.

2121020220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141482243 (or 7141482237 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2121020220231 its reverse (1320220201212), we get a palindrome (3441240421443).

The spelling of 2121020220231 in words is "two trillion, one hundred twenty-one billion, twenty million, two hundred twenty thousand, two hundred thirty-one".