1201021003220 has 24 divisors (see below), whose sum is σ = 2531450923008. Its totient is φ = 478635674400.

The previous prime is 1201021003213. The next prime is 1201021003243. The reversal of 1201021003220 is 223001201021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1201021003195 and 1201021003204.

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, 110789876 + ... + 110800715.

It is an arithmetic number, because the mean of its divisors is an integer number (105477121792).

Almost surely, 2^{1201021003220} is an apocalyptic number.

1201021003220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201021003220 is an abundant number, since it is smaller than the sum of its proper divisors (1330429919788).

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

1201021003220 is a wasteful number, since it uses less digits than its factorization.

1201021003220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221590871 (or 221590869 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1201021003220 its reverse (223001201021), we get a palindrome (1424022204241).

The spelling of 1201021003220 in words is "one trillion, two hundred one billion, twenty-one million, three thousand, two hundred twenty".