1020121120220 has 24 divisors (see below), whose sum is σ = 2142864655008. Its totient is φ = 407932200000.

The previous prime is 1020121120199. The next prime is 1020121120259. The reversal of 1020121120220 is 220211210201.

It is a junction number, because it is equal to n+sod(n) for n = 1020121120195 and 1020121120204.

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, 7193531 + ... + 7333970.

It is an arithmetic number, because the mean of its divisors is an integer number (89286027292).

Almost surely, 2^{1020121120220} is an apocalyptic number.

1020121120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020121120220 is an abundant number, since it is smaller than the sum of its proper divisors (1122743534788).

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

1020121120220 is a wasteful number, since it uses less digits than its factorization.

1020121120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14531021 (or 14531019 counting only the distinct ones).

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

Adding to 1020121120220 its reverse (220211210201), we get a palindrome (1240332330421).

The spelling of 1020121120220 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twenty".