1201211400 has 48 divisors (see below), whose sum is σ = 3723757200. Its totient is φ = 320322880.

The previous prime is 1201211393. The next prime is 1201211411. The reversal of 1201211400 is 41121021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 1000410 + ... + 1001609.

It is an arithmetic number, because the mean of its divisors is an integer number (77578275).

Almost surely, 2^1201211400 is an apocalyptic number.

1201211400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201211400 is an abundant number, since it is smaller than the sum of its proper divisors (2522545800).

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

1201211400 is a wasteful number, since it uses less digits than its factorization.

1201211400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002038 (or 2002029 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1201211400 is about 34658.4967937157. The cubic root of 1201211400 is about 1063.0160335314.

Adding to 1201211400 its reverse (41121021), we get a palindrome (1242332421).

The spelling of 1201211400 in words is "one billion, two hundred one million, two hundred eleven thousand, four hundred".