1201231000 has 64 divisors (see below), whose sum is σ = 2828105280. Its totient is φ = 477548800.

The previous prime is 1201230967. The next prime is 1201231013. The reversal of 1201231000 is 1321021.

It is a super-2 number, since 2×1201231000² = 2885911830722000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163404 + ... + 170596.

It is an arithmetic number, because the mean of its divisors is an integer number (44189145).

Almost surely, 2^1201231000 is an apocalyptic number.

1201231000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414052640).

1201231000 is an abundant number, since it is smaller than the sum of its proper divisors (1626874280).

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

1201231000 is a wasteful number, since it uses less digits than its factorization.

1201231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381 (or 7367 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1201231000 is about 34658.7795515076. The cubic root of 1201231000 is about 1063.0218151950.

Adding to 1201231000 its reverse (1321021), we get a palindrome (1202552021).

The spelling of 1201231000 in words is "one billion, two hundred one million, two hundred thirty-one thousand".