1021312201 has 16 divisors (see below), whose sum is σ = 1258516224. Its totient is φ = 807096384.

The previous prime is 1021312177. The next prime is 1021312219. The reversal of 1021312201 is 1022131201.

It is a cyclic number.

It is not a de Polignac number, because 1021312201 - 2⁹ = 1021311689 is a prime.

It is a super-2 number, since 2×1021312201² = 2086157223822928802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1021312231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74391 + ... + 87043.

It is an arithmetic number, because the mean of its divisors is an integer number (78657264).

Almost surely, 2^1021312201 is an apocalyptic number.

It is an amenable number.

1021312201 is a deficient number, since it is larger than the sum of its proper divisors (237204023).

1021312201 is a wasteful number, since it uses less digits than its factorization.

1021312201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13560.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1021312201 is about 31957.9755460198. The cubic root of 1021312201 is about 1007.0541884166.

Adding to 1021312201 its reverse (1022131201), we get a palindrome (2043443402).

The spelling of 1021312201 in words is "one billion, twenty-one million, three hundred twelve thousand, two hundred one".