31221020212203 has 8 divisors (see below), whose sum is σ = 41747992446528. Its totient is φ = 20754030726344.

The previous prime is 31221020212159. The next prime is 31221020212243. The reversal of 31221020212203 is 30221202012213.

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 31221020212203 - 2⁶ = 31221020212139 is a prime.

It is a super-2 number, since 2×31221020212203² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31221020212203.

It is not an unprimeable number, because it can be changed into a prime (31221020212243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14995685901 + ... + 14995687982.

It is an arithmetic number, because the mean of its divisors is an integer number (5218499055816).

Almost surely, 2^{31221020212203} is an apocalyptic number.

31221020212203 is a deficient number, since it is larger than the sum of its proper divisors (10526972234325).

31221020212203 is a wasteful number, since it uses less digits than its factorization.

31221020212203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29991374233.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31221020212203 its reverse (30221202012213), we get a palindrome (61442222224416).

The spelling of 31221020212203 in words is "thirty-one trillion, two hundred twenty-one billion, twenty million, two hundred twelve thousand, two hundred three".