1200122022100 has 36 divisors (see below), whose sum is σ = 2639939664124. Its totient is φ = 473472794880.

The previous prime is 1200122022089. The next prime is 1200122022131. The reversal of 1200122022100 is 12202210021.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 277822224 + 1199844199876 = 16668^2 + 1095374^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82192839 + ... + 82207438.

Almost surely, 2^{1200122022100} is an apocalyptic number.

1200122022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200122022100 is an abundant number, since it is smaller than the sum of its proper divisors (1439817642024).

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

1200122022100 is a wasteful number, since it uses less digits than its factorization.

1200122022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164400364 (or 164400357 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1200122022100 its reverse (12202210021), we get a palindrome (1212324232121).

The spelling of 1200122022100 in words is "one trillion, two hundred billion, one hundred twenty-two million, twenty-two thousand, one hundred".