31212020220001 has 4 divisors (see below), whose sum is σ = 31213094340400. Its totient is φ = 31210946099604.

The previous prime is 31212020219899. The next prime is 31212020220013. The reversal of 31212020220001 is 10002202021213.

It is a happy number.

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 31212020220001 - 2¹⁵ = 31212020187233 is a prime.

It is a super-3 number, since 3×31212020220001³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212020220041) 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, 537016611 + ... + 537074728.

It is an arithmetic number, because the mean of its divisors is an integer number (7803273585100).

Almost surely, 2^{31212020220001} is an apocalyptic number.

It is an amenable number.

31212020220001 is a deficient number, since it is larger than the sum of its proper divisors (1074120399).

31212020220001 is a wasteful number, since it uses less digits than its factorization.

31212020220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074120398.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31212020220001 its reverse (10002202021213), we get a palindrome (41214222241214).

The spelling of 31212020220001 in words is "thirty-one trillion, two hundred twelve billion, twenty million, two hundred twenty thousand, one".