1201420011 has 24 divisors (see below), whose sum is σ = 1762845840. Its totient is φ = 727270720.

The previous prime is 1201420001. The next prime is 1201420037. The reversal of 1201420011 is 1100241021.

It is a happy number.

It is not a de Polignac number, because 1201420011 - 2⁷ = 1201419883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201420001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 444781 + ... + 447473.

It is an arithmetic number, because the mean of its divisors is an integer number (73451910).

Almost surely, 2^1201420011 is an apocalyptic number.

1201420011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201420011 is a deficient number, since it is larger than the sum of its proper divisors (561425829).

1201420011 is a wasteful number, since it uses less digits than its factorization.

1201420011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947 (or 3936 counting only the distinct ones).

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

The square root of 1201420011 is about 34661.5061848155. The cubic root of 1201420011 is about 1063.0775669694.

Adding to 1201420011 its reverse (1100241021), we get a palindrome (2301661032).

The spelling of 1201420011 in words is "one billion, two hundred one million, four hundred twenty thousand, eleven".