31021220021002 has 8 divisors (see below), whose sum is σ = 46543023652356. Its totient is φ = 15506878803552.

The previous prime is 31021220020991. The next prime is 31021220021093. The reversal of 31021220021002 is 20012002212013.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30798937003041 + 222283017961 = 5549679^2 + 471469^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1865593083 + ... + 1865609710.

Almost surely, 2^{31021220021002} is an apocalyptic number.

31021220021002 is a deficient number, since it is larger than the sum of its proper divisors (15521803631354).

31021220021002 is a wasteful number, since it uses less digits than its factorization.

31021220021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3731206952.

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

Adding to 31021220021002 its reverse (20012002212013), we get a palindrome (51033222233015).

The spelling of 31021220021002 in words is "thirty-one trillion, twenty-one billion, two hundred twenty million, twenty-one thousand, two".