31033230212121 has 4 divisors (see below), whose sum is σ = 41377640282832. Its totient is φ = 20688820141412.

The previous prime is 31033230212113. The next prime is 31033230212141. The reversal of 31033230212121 is 12121203233013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31033230212121 - 2³ = 31033230212113 is a prime.

It is a super-2 number, since 2×31033230212121² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31033230212091 and 31033230212100.

It is not an unprimeable number, because it can be changed into a prime (31033230212141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5172205035351 + ... + 5172205035356.

It is an arithmetic number, because the mean of its divisors is an integer number (10344410070708).

Almost surely, 2^{31033230212121} is an apocalyptic number.

It is an amenable number.

31033230212121 is a deficient number, since it is larger than the sum of its proper divisors (10344410070711).

31033230212121 is a wasteful number, since it uses less digits than its factorization.

31033230212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10344410070710.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31033230212121 its reverse (12121203233013), we get a palindrome (43154433445134).

The spelling of 31033230212121 in words is "thirty-one trillion, thirty-three billion, two hundred thirty million, two hundred twelve thousand, one hundred twenty-one".