31212211202101 has 8 divisors (see below), whose sum is σ = 33078349647000. Its totient is φ = 29349420092928.

The previous prime is 31212211202093. The next prime is 31212211202141. The reversal of 31212211202101 is 10120211221213.

It can be written as a sum of positive squares in 4 ways, for example, as 6723311914225 + 24488899287876 = 2592935^2 + 4948626^2 .

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 31212211202101 - 2³ = 31212211202093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212211202141) 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, 836814726 + ... + 836852023.

It is an arithmetic number, because the mean of its divisors is an integer number (4134793705875).

Almost surely, 2^{31212211202101} is an apocalyptic number.

It is an amenable number.

31212211202101 is a deficient number, since it is larger than the sum of its proper divisors (1866138444899).

31212211202101 is a wasteful number, since it uses less digits than its factorization.

31212211202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673667863.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 31212211202101 its reverse (10120211221213), we get a palindrome (41332422423314).

The spelling of 31212211202101 in words is "thirty-one trillion, two hundred twelve billion, two hundred eleven million, two hundred two thousand, one hundred one".