201220312 has 8 divisors (see below), whose sum is σ = 377288100. Its totient is φ = 100610152.

The previous prime is 201220309. The next prime is 201220321. The reversal of 201220312 is 213022102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×201220312² = 80979227922754688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201220292 and 201220301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12576262 + ... + 12576277.

Almost surely, 2^201220312 is an apocalyptic number.

It is an amenable number.

201220312 is a deficient number, since it is larger than the sum of its proper divisors (176067788).

201220312 is a wasteful number, since it uses less digits than its factorization.

201220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25152545 (or 25152541 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 201220312 is about 14185.2145560087. The cubic root of 201220312 is about 585.9905413796.

Adding to 201220312 its reverse (213022102), we get a palindrome (414242414).

The spelling of 201220312 in words is "two hundred one million, two hundred twenty thousand, three hundred twelve".