31421221004212 has 24 divisors (see below), whose sum is σ = 60220593064800. Its totient is φ = 14256303661536.

The previous prime is 31421221004191. The next prime is 31421221004219. The reversal of 31421221004212 is 21240012212413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421221004219) 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, 5120795662 + ... + 5120801797.

It is an arithmetic number, because the mean of its divisors is an integer number (2509191377700).

Almost surely, 2^{31421221004212} is an apocalyptic number.

It is an amenable number.

31421221004212 is a deficient number, since it is larger than the sum of its proper divisors (28799372060588).

31421221004212 is a wasteful number, since it uses less digits than its factorization.

31421221004212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10241597535 (or 10241597533 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 31421221004212 its reverse (21240012212413), we get a palindrome (52661233216625).

The spelling of 31421221004212 in words is "thirty-one trillion, four hundred twenty-one billion, two hundred twenty-one million, four thousand, two hundred twelve".