1021221210010 has 8 divisors (see below), whose sum is σ = 1838198178036. Its totient is φ = 408488484000.

The previous prime is 1021221209993. The next prime is 1021221210013. The reversal of 1021221210010 is 100121221201.

It can be written as a sum of positive squares in 2 ways, for example, as 920200851441 + 101020358569 = 959271^2 + 317837^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1021221210013) 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, 51061060491 + ... + 51061060510.

Almost surely, 2^{1021221210010} is an apocalyptic number.

1021221210010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021221210010 is a deficient number, since it is larger than the sum of its proper divisors (816976968026).

1021221210010 is a wasteful number, since it uses less digits than its factorization.

1021221210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102122121008.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021221210010 its reverse (100121221201), we get a palindrome (1121342431211).

The spelling of 1021221210010 in words is "one trillion, twenty-one billion, two hundred twenty-one million, two hundred ten thousand, ten".