1021121011210 has 8 divisors (see below), whose sum is σ = 1838017820196. Its totient is φ = 408448404480.

The previous prime is 1021121011189. The next prime is 1021121011217. The reversal of 1021121011210 is 121101211201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 963414882369 + 57706128841 = 981537^2 + 240221^2 .

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 (1021121011217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51056050551 + ... + 51056050570.

Almost surely, 2^{1021121011210} is an apocalyptic number.

1021121011210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021121011210 is a deficient number, since it is larger than the sum of its proper divisors (816896808986).

1021121011210 is a wasteful number, since it uses less digits than its factorization.

1021121011210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102112101128.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021121011210 its reverse (121101211201), we get a palindrome (1142222222411).

The spelling of 1021121011210 in words is "one trillion, twenty-one billion, one hundred twenty-one million, eleven thousand, two hundred ten".