1021121202220 has 48 divisors (see below), whose sum is σ = 2529745440768. Its totient is φ = 338805190080.

The previous prime is 1021121202169. The next prime is 1021121202259. The reversal of 1021121202220 is 222021211201.

It is a happy number.

1021121202220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1021121202194 and 1021121202203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117636352 + ... + 117645031.

It is an arithmetic number, because the mean of its divisors is an integer number (52703030016).

Almost surely, 2^{1021121202220} is an apocalyptic number.

1021121202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021121202220 is an abundant number, since it is smaller than the sum of its proper divisors (1508624238548).

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

1021121202220 is a wasteful number, since it uses less digits than its factorization.

1021121202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235281430 (or 235281428 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021121202220 its reverse (222021211201), we get a palindrome (1243142413421).

The spelling of 1021121202220 in words is "one trillion, twenty-one billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty".