20210331121 has 8 divisors (see below), whose sum is σ = 20693971584. Its totient is φ = 19732218240.

The previous prime is 20210331107. The next prime is 20210331131. The reversal of 20210331121 is 12113301202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20210331121 - 2²³ = 20201942513 is a prime.

It is a super-2 number, since 2×20210331121² (a number of 21 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 = 20210331095 and 20210331104.

It is not an unprimeable number, because it can be changed into a prime (20210331131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1374496 + ... + 1389121.

It is an arithmetic number, because the mean of its divisors is an integer number (2586746448).

Almost surely, 2^20210331121 is an apocalyptic number.

It is an amenable number.

20210331121 is a deficient number, since it is larger than the sum of its proper divisors (483640463).

20210331121 is a wasteful number, since it uses less digits than its factorization.

20210331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763791.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20210331121 its reverse (12113301202), we get a palindrome (32323632323).

The spelling of 20210331121 in words is "twenty billion, two hundred ten million, three hundred thirty-one thousand, one hundred twenty-one".