1231020201100 has 36 divisors (see below), whose sum is σ = 2811909305800. Its totient is φ = 466491864960.

The previous prime is 1231020201071. The next prime is 1231020201101. The reversal of 1231020201100 is 11020201321.

It is not an unprimeable number, because it can be changed into a prime (1231020201101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323950785 + ... + 323954584.

Almost surely, 2^{1231020201100} is an apocalyptic number.

1231020201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231020201100 is an abundant number, since it is smaller than the sum of its proper divisors (1580889104700).

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

1231020201100 is a wasteful number, since it uses less digits than its factorization.

1231020201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647905402 (or 647905395 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1231020201100 its reverse (11020201321), we get a palindrome (1242040402421).

The spelling of 1231020201100 in words is "one trillion, two hundred thirty-one billion, twenty million, two hundred one thousand, one hundred".