1021221020120 has 32 divisors (see below), whose sum is σ = 2625996909600. Its totient is φ = 350132921088.

The previous prime is 1021221020093. The next prime is 1021221020153. The reversal of 1021221020120 is 210201221201.

It is a super-3 number, since 3×1021221020120³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1021221020095 and 1021221020104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1823608685 + ... + 1823609244.

It is an arithmetic number, because the mean of its divisors is an integer number (82062403425).

Almost surely, 2^{1021221020120} is an apocalyptic number.

1021221020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021221020120 is an abundant number, since it is smaller than the sum of its proper divisors (1604775889480).

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

1021221020120 is a wasteful number, since it uses less digits than its factorization.

1021221020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3647217947 (or 3647217943 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021221020120 its reverse (210201221201), we get a palindrome (1231422241321).

The spelling of 1021221020120 in words is "one trillion, twenty-one billion, two hundred twenty-one million, twenty thousand, one hundred twenty".