1200202021220 has 24 divisors (see below), whose sum is σ = 2555923180608. Its totient is φ = 473319106400.

The previous prime is 1200202021211. The next prime is 1200202021301. The reversal of 1200202021220 is 221202020021.

It is a junction number, because it is equal to n+sod(n) for n = 1200202021195 and 1200202021204.

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, 422604926 + ... + 422607765.

It is an arithmetic number, because the mean of its divisors is an integer number (106496799192).

Almost surely, 2^{1200202021220} is an apocalyptic number.

1200202021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200202021220 is an abundant number, since it is smaller than the sum of its proper divisors (1355721159388).

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

1200202021220 is a wasteful number, since it uses less digits than its factorization.

1200202021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845212771 (or 845212769 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1200202021220 its reverse (221202020021), we get a palindrome (1421404041241).

The spelling of 1200202021220 in words is "one trillion, two hundred billion, two hundred two million, twenty-one thousand, two hundred twenty".