1201121021010 has 32 divisors (see below), whose sum is σ = 2882942142912. Its totient is φ = 320270973120.

The previous prime is 1201121020961. The next prime is 1201121021029. The reversal of 1201121021010 is 101201211021.

It is a super-2 number, since 2×1201121021010² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1397389 + ... + 2086848.

It is an arithmetic number, because the mean of its divisors is an integer number (90091941966).

Almost surely, 2^{1201121021010} is an apocalyptic number.

1201121021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201121021010 is an abundant number, since it is smaller than the sum of its proper divisors (1681821121902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201121021010 is a wasteful number, since it uses less digits than its factorization.

1201121021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3495738.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201121021010 its reverse (101201211021), we get a palindrome (1302322232031).

The spelling of 1201121021010 in words is "one trillion, two hundred one billion, one hundred twenty-one million, twenty-one thousand, ten".