1021221223210 has 32 divisors (see below), whose sum is σ = 1864544054400. Its totient is φ = 402636669120.

The previous prime is 1021221223199. The next prime is 1021221223213. The reversal of 1021221223210 is 123221221201.

It is not an unprimeable number, because it can be changed into a prime (1021221223213) 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, 2764936 + ... + 3112444.

It is an arithmetic number, because the mean of its divisors is an integer number (58267001700).

Almost surely, 2^{1021221223210} is an apocalyptic number.

1021221223210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021221223210 is a deficient number, since it is larger than the sum of its proper divisors (843322831190).

1021221223210 is a wasteful number, since it uses less digits than its factorization.

1021221223210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351726.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1021221223210 its reverse (123221221201), we get a palindrome (1144442444411).

The spelling of 1021221223210 in words is "one trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred ten".