1022121200 has 30 divisors (see below), whose sum is σ = 2455647144. Its totient is φ = 408848320.

The previous prime is 1022121167. The next prime is 1022121203. The reversal of 1022121200 is 21212201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022121203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1277252 + ... + 1278051.

Almost surely, 2^1022121200 is an apocalyptic number.

1022121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022121200 is an abundant number, since it is smaller than the sum of its proper divisors (1433525944).

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

1022121200 is a wasteful number, since it uses less digits than its factorization.

1022121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555321 (or 2555310 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1022121200 is about 31970.6302721732. The cubic root of 1022121200 is about 1007.3200198999.

Adding to 1022121200 its reverse (21212201), we get a palindrome (1043333401).

The spelling of 1022121200 in words is "one billion, twenty-two million, one hundred twenty-one thousand, two hundred".